From ariel at fysik.su.se Mon Feb 8 15:44:16 2021 From: ariel at fysik.su.se (Ariel Goobar) Date: Mon, 8 Feb 2021 14:44:16 +0000 Subject: [Okc-wp4] Multi-messenger workshop, Feb 15 - 17.; 10- 12 AM Message-ID: Dear all, After consultation with several of you, here comes the agenda for next week’s remote WS on compact object mergers and associated multi-messenger (astro)physics, previously announced on the OKC-EO slack channel. To join, https://stockholmuniversity.zoom.us/j/63298679795 . Hopefully we can turn this into fun sessions, with lots of interactions! Many thanks! Ariel Day 1: 10-12, with a 5 mins break - Short introduction: who are we, why are we having this WS (Ariel, 5’) - quick round of presentations for newcomers (5’) - The multi-messenger landscape: an observer's view (Jesper, 20’) - ———————“————— : a theorist view (Stephan, 20’) After the break: "Theory" activities at OKC - New physics with GWs (Tom, 10’) - numerical relativity highlights NS-BH mergers and quark matter cores (Vivek, 20’) - Discussions, Q&A (<30’) Day 2: …. transition to observables... - KN modeling (Quentin, 20’) - Radiation transfer (Mattia, 20’) - Non-thermal emission of compact mergers (Christoffer 20) - New instruments (ZTF2, NOT explorer, MAAT, JWST, ALMA, …, Steve, 20’) . Discussions, Q&A Day 3: Optical surveys and simulation tools (Ana & Christian, 30’) Connecting the dots… and where do we go from here - General discussion (Hiranya leads. 1 hour + break) ___________________________________________________________________ Professor Ariel Goobar The Oskar Klein Centre for Cosmoparticle Physics Department of Physics, Stockholm University AlbaNova University Center, SE-106 91 Stockholm, SWEDEN tel:+46 8 55378659 fax:+46 8 55378601 web: www.fysik.su.se/~ariel -------------- next part -------------- An HTML attachment was scrubbed... URL: From ariel at fysik.su.se Mon Feb 15 07:43:41 2021 From: ariel at fysik.su.se (Ariel Goobar) Date: Mon, 15 Feb 2021 06:43:41 +0000 Subject: [Okc-wp4] Multi-messenger workshop, Feb 15 - 17.; 10- 12 AM In-Reply-To: References: Message-ID: Reminder: workshop starting at 10 AM CET today. /Ariel ___________________________________________________________________ Professor Ariel Goobar The Oskar Klein Centre for Cosmoparticle Physics Department of Physics, Stockholm University AlbaNova University Center, SE-106 91 Stockholm, SWEDEN tel:+46 8 55378659 fax:+46 8 55378601 web: www.fysik.su.se/~ariel On 8 Feb 2021, at 15:44, Ariel Goobar > wrote: Dear all, After consultation with several of you, here comes the agenda for next week’s remote WS on compact object mergers and associated multi-messenger (astro)physics, previously announced on the OKC-EO slack channel. To join, https://stockholmuniversity.zoom.us/j/63298679795 . Hopefully we can turn this into fun sessions, with lots of interactions! Many thanks! Ariel Day 1: 10-12, with a 5 mins break - Short introduction: who are we, why are we having this WS (Ariel, 5’) - quick round of presentations for newcomers (5’) - The multi-messenger landscape: an observer's view (Jesper, 20’) - ———————“————— : a theorist view (Stephan, 20’) After the break: "Theory" activities at OKC - New physics with GWs (Tom, 10’) - numerical relativity highlights NS-BH mergers and quark matter cores (Vivek, 20’) - Discussions, Q&A (<30’) Day 2: …. transition to observables... - KN modeling (Quentin, 20’) - Radiation transfer (Mattia, 20’) - Non-thermal emission of compact mergers (Christoffer 20) - New instruments (ZTF2, NOT explorer, MAAT, JWST, ALMA, …, Steve, 20’) . Discussions, Q&A Day 3: Optical surveys and simulation tools (Ana & Christian, 30’) Connecting the dots… and where do we go from here - General discussion (Hiranya leads. 1 hour + break) ___________________________________________________________________ Professor Ariel Goobar The Oskar Klein Centre for Cosmoparticle Physics Department of Physics, Stockholm University AlbaNova University Center, SE-106 91 Stockholm, SWEDEN tel:+46 8 55378659 fax:+46 8 55378601 web: www.fysik.su.se/~ariel ------------------------------------------------- okc-wp4 at albanova.se mailing list -------------- next part -------------- An HTML attachment was scrubbed... URL: From stephan.rosswog at astro.su.se Tue Feb 16 14:10:55 2021 From: stephan.rosswog at astro.su.se (Stephan Rosswog) Date: Tue, 16 Feb 2021 13:10:55 +0000 Subject: [Okc-wp4] Multi-messenger workshop, Feb 15 - 17.; 10- 12 AM In-Reply-To: References: Message-ID: <9D596B80-1A21-43A2-9000-0C545A7B122F@astro.su.se> Dear all as mentioned during the meeting today: there will be a school on "r-process and neutron star mergers" https://hifis-events.hzdr.de/event/48/ and you are welcome to register. Best Stephan On 8 Feb 2021, at 15:44, Ariel Goobar > wrote: Dear all, After consultation with several of you, here comes the agenda for next week’s remote WS on compact object mergers and associated multi-messenger (astro)physics, previously announced on the OKC-EO slack channel. To join, https://stockholmuniversity.zoom.us/j/63298679795 . Hopefully we can turn this into fun sessions, with lots of interactions! Many thanks! Ariel Day 1: 10-12, with a 5 mins break - Short introduction: who are we, why are we having this WS (Ariel, 5’) - quick round of presentations for newcomers (5’) - The multi-messenger landscape: an observer's view (Jesper, 20’) - ———————“————— : a theorist view (Stephan, 20’) After the break: "Theory" activities at OKC - New physics with GWs (Tom, 10’) - numerical relativity highlights NS-BH mergers and quark matter cores (Vivek, 20’) - Discussions, Q&A (<30’) Day 2: …. transition to observables... - KN modeling (Quentin, 20’) - Radiation transfer (Mattia, 20’) - Non-thermal emission of compact mergers (Christoffer 20) - New instruments (ZTF2, NOT explorer, MAAT, JWST, ALMA, …, Steve, 20’) . Discussions, Q&A Day 3: Optical surveys and simulation tools (Ana & Christian, 30’) Connecting the dots… and where do we go from here - General discussion (Hiranya leads. 1 hour + break) ___________________________________________________________________ Professor Ariel Goobar The Oskar Klein Centre for Cosmoparticle Physics Department of Physics, Stockholm University AlbaNova University Center, SE-106 91 Stockholm, SWEDEN tel:+46 8 55378659 fax:+46 8 55378601 web: www.fysik.su.se/~ariel ------------------------------------------------- okc-wp4 at albanova.se mailing list ---------------------------------------------- Prof. Dr. Stephan Rosswog Computational High-Energy Astrophysics The Oskar Klein Centre for Cosmoparticle Physics Department of Astronomy, Stockholm University AlbaNova, Roslagstullbacken 21 SE-10691 Stockholm, Sweden Email: stephan.rosswog at astro.su.se Tel.: +46 (0)8 5537 8529 URL: http://compact-merger.astro.su.se/ -------------- next part -------------- An HTML attachment was scrubbed... URL: From andre.schneider at astro.su.se Fri Apr 9 14:52:06 2021 From: andre.schneider at astro.su.se (Andre Schneider) Date: Fri, 9 Apr 2021 12:52:06 +0000 Subject: [Okc-wp4] OKC-day April 15 Message-ID: Dear colleagues, this is a reminder that the OKC-day will take place next week on April 15. It's a very simple program with a nice surprise included. :) Online event schedule: 13.00 - 13.05 Meet online, welcome from OKC Director 13.05 - 13.50 Parallel Session 1 13.50 - 14.05 Break 14.05 - 14.50 Parallel Session 2 14.50+ Fika! Register here! https://su.powerinit.com/Data/Event/EventTemplates/2602/?EventId=1202 Science discussion questions in Parallel Session 1 (pick one): - What happened in the early universe? Are there viable alternatives to inflation? - Why can’t I remember tomorrow? The arrow of time in physics - What is the densest matter in the Universe made of? - What role should theoretical models play when planning searches for Dark Matter? Science discussion questions in Parallel Session 2 (pick one): - What would it take to convince ourselves that we've detected Dark Matter? - What can we learn from kilonovae? Are they worth the price of admission? - AI and machine learning in physics - opportunities, challenges and pitfalls - What is the pivotal problem with gravity? Or are there several? --------------------------------- André da Silva Schneider Department of Astronomy Stockholm University -------------- next part -------------- An HTML attachment was scrubbed... URL: From andre.schneider at astro.su.se Tue Apr 20 16:06:05 2021 From: andre.schneider at astro.su.se (Andre Schneider) Date: Tue, 20 Apr 2021 14:06:05 +0000 Subject: [Okc-wp4] EO meeting Thu Apr 22 @ 13:15 via Zoom Message-ID: <7813a7533fe7414a9f12e90de11cfbd7@astro.su.se> Dear colleagues, our next EO meeting will take place this Thursday April 22 at 13:15 via Zoom. The meeting will be online. To join access https://stockholmuniversity.zoom.us/j/67706307789 You will be able to enter the meeting room from 13:00. See below for other methods to participate. This week Filip Samuelsson from KTH will present Title: Radiation mediated shocks in gamma-ray bursts Abstract: The roles of radiation mediated shocks (RMSs) and shock breakouts in the prompt emission of gamma-ray bursts (GRBs) have been studied for twenty years. However, so far, no such model has been fit to data due to their computational complexity. We aim to bridge this gap between theory and observation. In this talk, I will present an analogy that we have developed for this purpose, which is based on the similar evolution of the photon spectrum in an RMS and in repeated Compton scatterings with high-energy, thermal electrons. With this analogy we can accurately replicate spectra generated by a full-scale RMS simulation using a fraction of the computing time, allowing us to probe a large enough parameter space to fit the model to data. Finally, I will present fits to the prompt emission of the archetypical photospheric burst GRB 090902B. See you then! Andre da Silva Schneider is inviting you to a scheduled Zoom meeting. Topic: EO Meeting Time: Apr 22, 2021 01:00 PM Stockholm Every 14 days, until Jun 17, 2021, 5 occurrence(s) Apr 22, 2021 01:00 PM May 6, 2021 01:00 PM May 20, 2021 01:00 PM Jun 3, 2021 01:00 PM Jun 17, 2021 01:00 PM Please download and import the following iCalendar (.ics) files to your calendar system. Daily: https://stockholmuniversity.zoom.us/meeting/u5Mqd--rrjwtEt1cmpMBiMOcrbyKECFQ-ZCX/ics?icsToken=98tyKu-vqTssGdSStxGOR_MEB4igM-nziGZaj7cMnxL1LgJaTyz1JOBbGZdcNumd Join Zoom Meeting https://stockholmuniversity.zoom.us/j/67706307789 Meeting ID: 677 0630 7789 One tap mobile +46850500829,,67706307789# Sweden +46850520017,,67706307789# Sweden Dial by your location +46 8 5050 0829 Sweden +46 8 5052 0017 Sweden +46 850 539 728 Sweden +46 8 4468 2488 Sweden +46 8 5016 3827 Sweden +46 8 5050 0828 Sweden Meeting ID: 677 0630 7789 Find your local number: https://stockholmuniversity.zoom.us/u/cbOPX4tSzl Join by SIP 67706307789 at 109.105.112.236 67706307789 at 109.105.112.235 Join by H.323 109.105.112.236 109.105.112.235 Meeting ID: 677 0630 7789 Join by Skype for Business https://stockholmuniversity.zoom.us/skype/67706307789 --------------------------------- André da Silva Schneider Department of Astronomy Stockholm University -------------- next part -------------- An HTML attachment was scrubbed... URL: From andre.schneider at astro.su.se Thu Apr 22 02:34:37 2021 From: andre.schneider at astro.su.se (Andre Schneider) Date: Thu, 22 Apr 2021 00:34:37 +0000 Subject: [Okc-wp4] EO meeting Thu Apr 22 @ 13:15 via Zoom In-Reply-To: <7813a7533fe7414a9f12e90de11cfbd7@astro.su.se> References: <7813a7533fe7414a9f12e90de11cfbd7@astro.su.se> Message-ID: <3928ee0a99354a40a4bacff2ca210867@astro.su.se> Reminder of this Thursday's EO meeting! --------------------------------- André da Silva Schneider Department of Astronomy Stockholm University ________________________________ From: Okc-wp4-at-fysik.su.se on behalf of Andre Schneider Sent: Tuesday, April 20, 2021 4:06 PM To: Okc-wp4 at fysik.su.se Subject: [Okc-wp4] EO meeting Thu Apr 22 @ 13:15 via Zoom Dear colleagues, our next EO meeting will take place this Thursday April 22 at 13:15 via Zoom. The meeting will be online. To join access https://stockholmuniversity.zoom.us/j/67706307789 You will be able to enter the meeting room from 13:00. See below for other methods to participate. This week Filip Samuelsson from KTH will present Title: Radiation mediated shocks in gamma-ray bursts Abstract: The roles of radiation mediated shocks (RMSs) and shock breakouts in the prompt emission of gamma-ray bursts (GRBs) have been studied for twenty years. However, so far, no such model has been fit to data due to their computational complexity. We aim to bridge this gap between theory and observation. In this talk, I will present an analogy that we have developed for this purpose, which is based on the similar evolution of the photon spectrum in an RMS and in repeated Compton scatterings with high-energy, thermal electrons. With this analogy we can accurately replicate spectra generated by a full-scale RMS simulation using a fraction of the computing time, allowing us to probe a large enough parameter space to fit the model to data. Finally, I will present fits to the prompt emission of the archetypical photospheric burst GRB 090902B. See you then! Andre da Silva Schneider is inviting you to a scheduled Zoom meeting. Topic: EO Meeting Time: Apr 22, 2021 01:00 PM Stockholm Every 14 days, until Jun 17, 2021, 5 occurrence(s) Apr 22, 2021 01:00 PM May 6, 2021 01:00 PM May 20, 2021 01:00 PM Jun 3, 2021 01:00 PM Jun 17, 2021 01:00 PM Please download and import the following iCalendar (.ics) files to your calendar system. Daily: https://stockholmuniversity.zoom.us/meeting/u5Mqd--rrjwtEt1cmpMBiMOcrbyKECFQ-ZCX/ics?icsToken=98tyKu-vqTssGdSStxGOR_MEB4igM-nziGZaj7cMnxL1LgJaTyz1JOBbGZdcNumd Join Zoom Meeting https://stockholmuniversity.zoom.us/j/67706307789 Meeting ID: 677 0630 7789 One tap mobile +46850500829,,67706307789# Sweden +46850520017,,67706307789# Sweden Dial by your location +46 8 5050 0829 Sweden +46 8 5052 0017 Sweden +46 850 539 728 Sweden +46 8 4468 2488 Sweden +46 8 5016 3827 Sweden +46 8 5050 0828 Sweden Meeting ID: 677 0630 7789 Find your local number: https://stockholmuniversity.zoom.us/u/cbOPX4tSzl Join by SIP 67706307789 at 109.105.112.236 67706307789 at 109.105.112.235 Join by H.323 109.105.112.236 109.105.112.235 Meeting ID: 677 0630 7789 Join by Skype for Business https://stockholmuniversity.zoom.us/skype/67706307789 --------------------------------- André da Silva Schneider Department of Astronomy Stockholm University -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: ATT00001.txt URL: From andre.schneider at astro.su.se Mon May 3 22:40:34 2021 From: andre.schneider at astro.su.se (Andre Schneider) Date: Mon, 3 May 2021 20:40:34 +0000 Subject: [Okc-wp4] EO meeting Thu May 6 @ 13:15 via Zoom Message-ID: <639f634e4b4549b5bcdf32ab363282e4@astro.su.se> Dear colleagues, our next EO meeting will take place this Thursday May 6 at 13:15 via Zoom. The meeting will be online. To join access https://stockholmuniversity.zoom.us/j/67706307789 You will be able to enter the meeting room from 13:00. See below for other methods to participate. This week Joel Pearson Johansson from Stockholm University will present Title: Seeing through the dirt - Type Ia SNe in the Infrared Abstract: Type Ia supernovae (SN Ia) have played an extremely important role as distance indicators in cosmology, but we still lack a detailed astrophysical understanding of their progenitor systems, explosion mechanisms and how their luminosities depend on the local environment. I will show some recent work on how near- and mid-Infrared observations can be used to make more precise distance measurements and help answer the question: “what explodes, and how?” While being extremely numerous in optical surveys (e.g. >3500 SNe Ia detected in three years by ZTF), only a small fraction of all SNe Ia (~250) have near-IR lightcurves. Not only are SNe better “standard candles” at these wavelengths - the NIR allows us to see through dust in the SN host galaxies and better correct for extinction along the line-of-sight. I will show how this solves the decade long puzzle of a “mass step”, seen between the corrected luminosities of SNe hosted in low- and high-mass galaxies. I will also show some ongoing work on the extremes of thermonuclear supernova zoo (e.g. superluminous "super-chandrasekhar" Ia's and subluminous “Iax" SNe) and how mid-IR observations with Spitzer (and in the future with JWST) can give new insights to the progenitors and explosion mechanisms. At late times, in the nebular phase, the ejecta become optically thin, allowing us to "see through" the supernova and directly probe its composition, density, temperature, and kinematic structure. Furthermore, mid-IR observations can also show evidence of pre-existing or newly formed dust in the SN ejecta or the circumstellar environment. See you then! Andre da Silva Schneider is inviting you to a scheduled Zoom meeting. Topic: EO Meeting Time: Apr 22, 2021 01:00 PM Stockholm Every 14 days, until Jun 17, 2021, 5 occurrence(s) Apr 22, 2021 01:00 PM May 6, 2021 01:00 PM May 20, 2021 01:00 PM Jun 3, 2021 01:00 PM Jun 17, 2021 01:00 PM Please download and import the following iCalendar (.ics) files to your calendar system. Daily: https://stockholmuniversity.zoom.us/meeting/u5Mqd--rrjwtEt1cmpMBiMOcrbyKECFQ-ZCX/ics?icsToken=98tyKu-vqTssGdSStxGOR_MEB4igM-nziGZaj7cMnxL1LgJaTyz1JOBbGZdcNumd Join Zoom Meeting https://stockholmuniversity.zoom.us/j/67706307789 Meeting ID: 677 0630 7789 One tap mobile +46850500829,,67706307789# Sweden +46850520017,,67706307789# Sweden Dial by your location +46 8 5050 0829 Sweden +46 8 5052 0017 Sweden +46 850 539 728 Sweden +46 8 4468 2488 Sweden +46 8 5016 3827 Sweden +46 8 5050 0828 Sweden Meeting ID: 677 0630 7789 Find your local number: https://stockholmuniversity.zoom.us/u/cbOPX4tSzl Join by SIP 67706307789 at 109.105.112.236 67706307789 at 109.105.112.235 Join by H.323 109.105.112.236 109.105.112.235 Meeting ID: 677 0630 7789 Join by Skype for Business https://stockholmuniversity.zoom.us/skype/67706307789 --------------------------------- André da Silva Schneider Department of Astronomy Stockholm University -------------- next part -------------- An HTML attachment was scrubbed... URL: From evan.oconnor at astro.su.se Tue May 4 08:42:17 2021 From: evan.oconnor at astro.su.se (Evan Patrick O'Connor) Date: Tue, 4 May 2021 06:42:17 +0000 Subject: [Okc-wp4] EO meeting Thu May 6 @ 13:15 via Zoom In-Reply-To: <639f634e4b4549b5bcdf32ab363282e4@astro.su.se> References: <639f634e4b4549b5bcdf32ab363282e4@astro.su.se> Message-ID: <1a208401ddd94f7489b6ecac56e30738@astro.su.se> Hi all, We will also be taking a group photo, we haven’t had one in a while. Evan ________________________________ From: Okc-wp4-at-fysik.su.se on behalf of Andre Schneider Sent: Monday, May 3, 2021 10:40:34 PM To: Okc-wp4 at fysik.su.se; people at nordita.org Subject: [Okc-wp4] EO meeting Thu May 6 @ 13:15 via Zoom Dear colleagues, our next EO meeting will take place this Thursday May 6 at 13:15 via Zoom. The meeting will be online. To join access https://stockholmuniversity.zoom.us/j/67706307789 You will be able to enter the meeting room from 13:00. See below for other methods to participate. This week Joel Pearson Johansson from Stockholm University will present Title: Seeing through the dirt - Type Ia SNe in the Infrared Abstract: Type Ia supernovae (SN Ia) have played an extremely important role as distance indicators in cosmology, but we still lack a detailed astrophysical understanding of their progenitor systems, explosion mechanisms and how their luminosities depend on the local environment. I will show some recent work on how near- and mid-Infrared observations can be used to make more precise distance measurements and help answer the question: “what explodes, and how?” While being extremely numerous in optical surveys (e.g. >3500 SNe Ia detected in three years by ZTF), only a small fraction of all SNe Ia (~250) have near-IR lightcurves. Not only are SNe better “standard candles” at these wavelengths - the NIR allows us to see through dust in the SN host galaxies and better correct for extinction along the line-of-sight. I will show how this solves the decade long puzzle of a “mass step”, seen between the corrected luminosities of SNe hosted in low- and high-mass galaxies. I will also show some ongoing work on the extremes of thermonuclear supernova zoo (e.g. superluminous "super-chandrasekhar" Ia's and subluminous “Iax" SNe) and how mid-IR observations with Spitzer (and in the future with JWST) can give new insights to the progenitors and explosion mechanisms. At late times, in the nebular phase, the ejecta become optically thin, allowing us to "see through" the supernova and directly probe its composition, density, temperature, and kinematic structure. Furthermore, mid-IR observations can also show evidence of pre-existing or newly formed dust in the SN ejecta or the circumstellar environment. See you then! Andre da Silva Schneider is inviting you to a scheduled Zoom meeting. Topic: EO Meeting Time: Apr 22, 2021 01:00 PM Stockholm Every 14 days, until Jun 17, 2021, 5 occurrence(s) Apr 22, 2021 01:00 PM May 6, 2021 01:00 PM May 20, 2021 01:00 PM Jun 3, 2021 01:00 PM Jun 17, 2021 01:00 PM Please download and import the following iCalendar (.ics) files to your calendar system. Daily: https://stockholmuniversity.zoom.us/meeting/u5Mqd--rrjwtEt1cmpMBiMOcrbyKECFQ-ZCX/ics?icsToken=98tyKu-vqTssGdSStxGOR_MEB4igM-nziGZaj7cMnxL1LgJaTyz1JOBbGZdcNumd Join Zoom Meeting https://stockholmuniversity.zoom.us/j/67706307789 Meeting ID: 677 0630 7789 One tap mobile +46850500829,,67706307789# Sweden +46850520017,,67706307789# Sweden Dial by your location +46 8 5050 0829 Sweden +46 8 5052 0017 Sweden +46 850 539 728 Sweden +46 8 4468 2488 Sweden +46 8 5016 3827 Sweden +46 8 5050 0828 Sweden Meeting ID: 677 0630 7789 Find your local number: https://stockholmuniversity.zoom.us/u/cbOPX4tSzl Join by SIP 67706307789 at 109.105.112.236 67706307789 at 109.105.112.235 Join by H.323 109.105.112.236 109.105.112.235 Meeting ID: 677 0630 7789 Join by Skype for Business https://stockholmuniversity.zoom.us/skype/67706307789 --------------------------------- André da Silva Schneider Department of Astronomy Stockholm University -------------- next part -------------- An HTML attachment was scrubbed... URL: From andre.schneider at astro.su.se Thu May 6 04:00:57 2021 From: andre.schneider at astro.su.se (Andre Schneider) Date: Thu, 6 May 2021 02:00:57 +0000 Subject: [Okc-wp4] EO meeting Thu May 6 @ 13:15 via Zoom In-Reply-To: <639f634e4b4549b5bcdf32ab363282e4@astro.su.se> References: <639f634e4b4549b5bcdf32ab363282e4@astro.su.se> Message-ID: <7d238e70432b416881adf5fb7d15af9a@astro.su.se> Reminder of the EO meeting this Thursday afternoon! --------------------------------- André da Silva Schneider Department of Astronomy Stockholm University ________________________________ From: Okc-wp4-at-fysik.su.se on behalf of Andre Schneider Sent: Monday, May 3, 2021 10:40:34 PM To: Okc-wp4 at fysik.su.se; people at nordita.org Subject: [Okc-wp4] EO meeting Thu May 6 @ 13:15 via Zoom Dear colleagues, our next EO meeting will take place this Thursday May 6 at 13:15 via Zoom. The meeting will be online. To join access https://stockholmuniversity.zoom.us/j/67706307789 You will be able to enter the meeting room from 13:00. See below for other methods to participate. This week Joel Pearson Johansson from Stockholm University will present Title: Seeing through the dirt - Type Ia SNe in the Infrared Abstract: Type Ia supernovae (SN Ia) have played an extremely important role as distance indicators in cosmology, but we still lack a detailed astrophysical understanding of their progenitor systems, explosion mechanisms and how their luminosities depend on the local environment. I will show some recent work on how near- and mid-Infrared observations can be used to make more precise distance measurements and help answer the question: “what explodes, and how?” While being extremely numerous in optical surveys (e.g. >3500 SNe Ia detected in three years by ZTF), only a small fraction of all SNe Ia (~250) have near-IR lightcurves. Not only are SNe better “standard candles” at these wavelengths - the NIR allows us to see through dust in the SN host galaxies and better correct for extinction along the line-of-sight. I will show how this solves the decade long puzzle of a “mass step”, seen between the corrected luminosities of SNe hosted in low- and high-mass galaxies. I will also show some ongoing work on the extremes of thermonuclear supernova zoo (e.g. superluminous "super-chandrasekhar" Ia's and subluminous “Iax" SNe) and how mid-IR observations with Spitzer (and in the future with JWST) can give new insights to the progenitors and explosion mechanisms. At late times, in the nebular phase, the ejecta become optically thin, allowing us to "see through" the supernova and directly probe its composition, density, temperature, and kinematic structure. Furthermore, mid-IR observations can also show evidence of pre-existing or newly formed dust in the SN ejecta or the circumstellar environment. See you then! Andre da Silva Schneider is inviting you to a scheduled Zoom meeting. Topic: EO Meeting Time: Apr 22, 2021 01:00 PM Stockholm Every 14 days, until Jun 17, 2021, 5 occurrence(s) Apr 22, 2021 01:00 PM May 6, 2021 01:00 PM May 20, 2021 01:00 PM Jun 3, 2021 01:00 PM Jun 17, 2021 01:00 PM Please download and import the following iCalendar (.ics) files to your calendar system. Daily: https://stockholmuniversity.zoom.us/meeting/u5Mqd--rrjwtEt1cmpMBiMOcrbyKECFQ-ZCX/ics?icsToken=98tyKu-vqTssGdSStxGOR_MEB4igM-nziGZaj7cMnxL1LgJaTyz1JOBbGZdcNumd Join Zoom Meeting https://stockholmuniversity.zoom.us/j/67706307789 Meeting ID: 677 0630 7789 One tap mobile +46850500829,,67706307789# Sweden +46850520017,,67706307789# Sweden Dial by your location +46 8 5050 0829 Sweden +46 8 5052 0017 Sweden +46 850 539 728 Sweden +46 8 4468 2488 Sweden +46 8 5016 3827 Sweden +46 8 5050 0828 Sweden Meeting ID: 677 0630 7789 Find your local number: https://stockholmuniversity.zoom.us/u/cbOPX4tSzl Join by SIP 67706307789 at 109.105.112.236 67706307789 at 109.105.112.235 Join by H.323 109.105.112.236 109.105.112.235 Meeting ID: 677 0630 7789 Join by Skype for Business https://stockholmuniversity.zoom.us/skype/67706307789 --------------------------------- André da Silva Schneider Department of Astronomy Stockholm University -------------- next part -------------- An HTML attachment was scrubbed... URL: From andre.schneider at astro.su.se Wed May 19 22:23:36 2021 From: andre.schneider at astro.su.se (Andre Schneider) Date: Wed, 19 May 2021 20:23:36 +0000 Subject: [Okc-wp4] EO meeting Thu May 20 @ 13:15 via Zoom Message-ID: Dear colleagues, our next EO meeting will take place this Thursday May 20 at 13:15 via Zoom. To join access https://stockholmuniversity.zoom.us/j/67706307789 You will be able to enter the meeting room from 13:00. See below for other methods to participate. This week our speaker is Anders Jerkstrand from Stockholm University. (I am sorry about the late announcement and lack of title/abstract. This was due to a mistake on my part. I will amend this announcement with the talk's title and abstract as soon as possible.) See you then! Andre da Silva Schneider is inviting you to a scheduled Zoom meeting. Topic: EO Meeting Time: Apr 22, 2021 01:00 PM Stockholm Every 14 days, until Jun 17, 2021, 5 occurrence(s) Apr 22, 2021 01:00 PM May 6, 2021 01:00 PM May 20, 2021 01:00 PM Jun 3, 2021 01:00 PM Jun 17, 2021 01:00 PM Please download and import the following iCalendar (.ics) files to your calendar system. Daily: https://stockholmuniversity.zoom.us/meeting/u5Mqd--rrjwtEt1cmpMBiMOcrbyKECFQ-ZCX/ics?icsToken=98tyKu-vqTssGdSStxGOR_MEB4igM-nziGZaj7cMnxL1LgJaTyz1JOBbGZdcNumd Join Zoom Meeting https://stockholmuniversity.zoom.us/j/67706307789 Meeting ID: 677 0630 7789 One tap mobile +46850500829,,67706307789# Sweden +46850520017,,67706307789# Sweden Dial by your location +46 8 5050 0829 Sweden +46 8 5052 0017 Sweden +46 850 539 728 Sweden +46 8 4468 2488 Sweden +46 8 5016 3827 Sweden +46 8 5050 0828 Sweden Meeting ID: 677 0630 7789 Find your local number: https://stockholmuniversity.zoom.us/u/cbOPX4tSzl Join by SIP 67706307789 at 109.105.112.236 67706307789 at 109.105.112.235 Join by H.323 109.105.112.236 109.105.112.235 Meeting ID: 677 0630 7789 Join by Skype for Business https://stockholmuniversity.zoom.us/skype/67706307789 --------------------------------- André da Silva Schneider Department of Astronomy Stockholm University -------------- next part -------------- An HTML attachment was scrubbed... URL: From andre.schneider at astro.su.se Thu May 20 09:33:49 2021 From: andre.schneider at astro.su.se (Andre Schneider) Date: Thu, 20 May 2021 07:33:49 +0000 Subject: [Okc-wp4] EO meeting Thu May 20 @ 13:15 via Zoom In-Reply-To: References: Message-ID: Reminder of the EO meeting this afternoon Dear colleagues, our next EO meeting will take place this Thursday May 20 at 13:15 via Zoom. To join access https://stockholmuniversity.zoom.us/j/67706307789 You will be able to enter the meeting room from 13:00. See below for other methods to participate. This week Anders Jerkstrand from Stockholm University will present Title: “Modelling kilonova spectra with SUMO” Abstract: I discuss ongoing efforts to adapt the SUMO spectral synthesis code, normally used to model late-time SN spectra, to kilonova modelling. I will in particular review temperature determination methodologies in different codes, and discuss possible effects when going from LTE towards NLTE modelling. See you then! Andre da Silva Schneider is inviting you to a scheduled Zoom meeting. Topic: EO Meeting Time: Apr 22, 2021 01:00 PM Stockholm Every 14 days, until Jun 17, 2021, 5 occurrence(s) Apr 22, 2021 01:00 PM May 6, 2021 01:00 PM May 20, 2021 01:00 PM Jun 3, 2021 01:00 PM Jun 17, 2021 01:00 PM Please download and import the following iCalendar (.ics) files to your calendar system. Daily: https://stockholmuniversity.zoom.us/meeting/u5Mqd--rrjwtEt1cmpMBiMOcrbyKECFQ-ZCX/ics?icsToken=98tyKu-vqTssGdSStxGOR_MEB4igM-nziGZaj7cMnxL1LgJaTyz1JOBbGZdcNumd Join Zoom Meeting https://stockholmuniversity.zoom.us/j/67706307789 Meeting ID: 677 0630 7789 One tap mobile +46850500829,,67706307789# Sweden +46850520017,,67706307789# Sweden Dial by your location +46 8 5050 0829 Sweden +46 8 5052 0017 Sweden +46 850 539 728 Sweden +46 8 4468 2488 Sweden +46 8 5016 3827 Sweden +46 8 5050 0828 Sweden Meeting ID: 677 0630 7789 Find your local number: https://stockholmuniversity.zoom.us/u/cbOPX4tSzl Join by SIP 67706307789 at 109.105.112.236 67706307789 at 109.105.112.235 Join by H.323 109.105.112.236 109.105.112.235 Meeting ID: 677 0630 7789 Join by Skype for Business https://stockholmuniversity.zoom.us/skype/67706307789 --------------------------------- André da Silva Schneider Department of Astronomy Stockholm University -------------- next part -------------- An HTML attachment was scrubbed... URL: From andre.schneider at astro.su.se Tue Jun 8 10:45:48 2021 From: andre.schneider at astro.su.se (Andre Schneider) Date: Tue, 8 Jun 2021 08:45:48 +0000 Subject: [Okc-wp4] EO meeting Thu Jun 10 @ 13:15 via Zoom Message-ID: <3470ba71751b4eb5ab12499bfa39199f@astro.su.se> Dear colleagues, our next EO meeting will take place this Thursday Jun 10 at 13:15 via Zoom. To join access https://stockholmuniversity.zoom.us/j/67706307789 You will be able to enter the meeting room from 13:00. See below for other methods to participate. This week Ragnhild Lunnan from Stockholm University will present Title: Superluminous Supernovae from the Zwicky Transient Facility Abstract: In the past decade, the new generation of untargeted, wide-field transient surveys have discovered a number of new types of explosions. An example of these are the so-called "superluminous" supernovae, with peak luminosities and radiated energies exceeding those of ordinary core-collapse and Type Ia SNe by factors of 10-100. These extreme energetics cannot be explained by the same mechanisms that power ordinary supernovae, requiring either an additional energy source beyond the decay of radioactive Nickel-56, or an exotic explosion mechanism. They are also preferentially found in dwarf galaxies, suggesting that low metallicity play a role in their production. Thus, superluminous supernovae represent both a challenge to our understanding of the evolution and deaths of massive, metal-poor stars, and of the powering of optical emission in supernovae. Since 2018, the Zwicky Transient Facility has carried out a survey of the entire Northern sky at 3-day cadence, which has proven to be a fantastic discovery engine for superluminous supernovae, with several hundred objects discovered to date. In this talk, I will review recent results and ongoing research being done with this groundbreaking data set. See you then! Andre da Silva Schneider is inviting you to a scheduled Zoom meeting. Topic: EO Meeting Time: Jun 10, 2021 01:00 PM Stockholm Every week on Thu, until Jun 17, 2021, 2 occurrence(s) Jun 10, 2021 01:00 PM Jun 17, 2021 01:00 PM Please download and import the following iCalendar (.ics) files to your calendar system. Weekly: https://stockholmuniversity.zoom.us/meeting/u5Mqd--rrjwtEt1cmpMBiMOcrbyKECFQ-ZCX/ics?icsToken=98tyKu-vqTssGdSStxGOR_MEB4igM-nziGZaj7cMnxL1LgJaTyz1JOBbGZdcNumd Join Zoom Meeting https://stockholmuniversity.zoom.us/j/67706307789 Meeting ID: 677 0630 7789 One tap mobile +46850500829,,67706307789# Sweden +46850520017,,67706307789# Sweden Dial by your location +46 8 5050 0829 Sweden +46 8 5052 0017 Sweden +46 850 539 728 Sweden +46 8 4468 2488 Sweden +46 8 5016 3827 Sweden +46 8 5050 0828 Sweden Meeting ID: 677 0630 7789 Find your local number: https://stockholmuniversity.zoom.us/u/cbOPX4tSzl Join by SIP 67706307789 at 109.105.112.236 67706307789 at 109.105.112.235 Join by H.323 109.105.112.236 109.105.112.235 Meeting ID: 677 0630 7789 Join by Skype for Business https://stockholmuniversity.zoom.us/skype/67706307789 --------------------------------- André da Silva Schneider Department of Astronomy Stockholm University -------------- next part -------------- An HTML attachment was scrubbed... URL: From andre.schneider at astro.su.se Thu Jun 10 09:57:45 2021 From: andre.schneider at astro.su.se (Andre Schneider) Date: Thu, 10 Jun 2021 07:57:45 +0000 Subject: [Okc-wp4] EO meeting Thu Jun 10 @ 13:15 via Zoom In-Reply-To: <3470ba71751b4eb5ab12499bfa39199f@astro.su.se> References: <3470ba71751b4eb5ab12499bfa39199f@astro.su.se> Message-ID: <736f3f286a5e4f9b919ff1f49bea91e7@astro.su.se> Reminder of the EO meeting this afternoon at 13:15. --------------------------------- André da Silva Schneider Department of Astronomy Stockholm University ________________________________ From: Okc-wp4-at-fysik.su.se on behalf of Andre Schneider Sent: Tuesday, June 8, 2021 10:45:48 AM To: Okc-wp4 at fysik.su.se; people at nordita.org Subject: [Okc-wp4] EO meeting Thu Jun 10 @ 13:15 via Zoom Dear colleagues, our next EO meeting will take place this Thursday Jun 10 at 13:15 via Zoom. To join access https://stockholmuniversity.zoom.us/j/67706307789 You will be able to enter the meeting room from 13:00. See below for other methods to participate. This week Ragnhild Lunnan from Stockholm University will present Title: Superluminous Supernovae from the Zwicky Transient Facility Abstract: In the past decade, the new generation of untargeted, wide-field transient surveys have discovered a number of new types of explosions. An example of these are the so-called "superluminous" supernovae, with peak luminosities and radiated energies exceeding those of ordinary core-collapse and Type Ia SNe by factors of 10-100. These extreme energetics cannot be explained by the same mechanisms that power ordinary supernovae, requiring either an additional energy source beyond the decay of radioactive Nickel-56, or an exotic explosion mechanism. They are also preferentially found in dwarf galaxies, suggesting that low metallicity play a role in their production. Thus, superluminous supernovae represent both a challenge to our understanding of the evolution and deaths of massive, metal-poor stars, and of the powering of optical emission in supernovae. Since 2018, the Zwicky Transient Facility has carried out a survey of the entire Northern sky at 3-day cadence, which has proven to be a fantastic discovery engine for superluminous supernovae, with several hundred objects discovered to date. In this talk, I will review recent results and ongoing research being done with this groundbreaking data set. See you then! Andre da Silva Schneider is inviting you to a scheduled Zoom meeting. Topic: EO Meeting Time: Jun 10, 2021 01:00 PM Stockholm Every week on Thu, until Jun 17, 2021, 2 occurrence(s) Jun 10, 2021 01:00 PM Jun 17, 2021 01:00 PM Please download and import the following iCalendar (.ics) files to your calendar system. Weekly: https://stockholmuniversity.zoom.us/meeting/u5Mqd--rrjwtEt1cmpMBiMOcrbyKECFQ-ZCX/ics?icsToken=98tyKu-vqTssGdSStxGOR_MEB4igM-nziGZaj7cMnxL1LgJaTyz1JOBbGZdcNumd Join Zoom Meeting https://stockholmuniversity.zoom.us/j/67706307789 Meeting ID: 677 0630 7789 One tap mobile +46850500829,,67706307789# Sweden +46850520017,,67706307789# Sweden Dial by your location +46 8 5050 0829 Sweden +46 8 5052 0017 Sweden +46 850 539 728 Sweden +46 8 4468 2488 Sweden +46 8 5016 3827 Sweden +46 8 5050 0828 Sweden Meeting ID: 677 0630 7789 Find your local number: https://stockholmuniversity.zoom.us/u/cbOPX4tSzl Join by SIP 67706307789 at 109.105.112.236 67706307789 at 109.105.112.235 Join by H.323 109.105.112.236 109.105.112.235 Meeting ID: 677 0630 7789 Join by Skype for Business https://stockholmuniversity.zoom.us/skype/67706307789 --------------------------------- André da Silva Schneider Department of Astronomy Stockholm University -------------- next part -------------- An HTML attachment was scrubbed... URL: From andre.schneider at astro.su.se Mon Jun 14 16:59:20 2021 From: andre.schneider at astro.su.se (Andre Schneider) Date: Mon, 14 Jun 2021 14:59:20 +0000 Subject: [Okc-wp4] EO meeting Thu Jun 17 @ 13:15 via Zoom Message-ID: Dear colleagues, our next EO meeting will take place this Thursday Jun 17 at 13:15 via Zoom. To join access https://stockholmuniversity.zoom.us/j/67706307789 You will be able to enter the meeting room from 13:00. See below for other methods to participate. This week Mattia Bulla from Stockholm University will present Title: Let there be light: Illuminating compact object mergers with radiative transfer simulations Abstract: The detection of an electromagnetic counterpart to the gravitational-wave source GW 170817 marked year zero of the multi-messenger gravitational-wave era. This event was generated by the merger of two neutron stars and gave rise to an electromagnetic transient, dubbed a “kilonova”, which was intensively monitored with all the main ground-based and space-borne facilities. In this talk, I will present the code POSSIS and show how radiative transfer simulations can illuminate neutron star merger models and provide a natural connection between models and observational data. I will show how viewing-angle dependent synthetic observables - as light curves, spectra and polarization - can be used to interpret data, place constraints on models and guide future follow-up campaigns of gravitational-wave events. I will end my talk by discussing some recent upgrades to POSSIS. See you then! Andre da Silva Schneider is inviting you to a scheduled Zoom meeting. Topic: EO Meeting Time: Jun 10, 2021 01:00 PM Stockholm Every week on Thu, until Jun 17, 2021, 2 occurrence(s) Jun 10, 2021 01:00 PM Jun 17, 2021 01:00 PM Please download and import the following iCalendar (.ics) files to your calendar system. Weekly: https://stockholmuniversity.zoom.us/meeting/u5Mqd--rrjwtEt1cmpMBiMOcrbyKECFQ-ZCX/ics?icsToken=98tyKu-vqTssGdSStxGOR_MEB4igM-nziGZaj7cMnxL1LgJaTyz1JOBbGZdcNumd Join Zoom Meeting https://stockholmuniversity.zoom.us/j/67706307789 Meeting ID: 677 0630 7789 One tap mobile +46850500829,,67706307789# Sweden +46850520017,,67706307789# Sweden Dial by your location +46 8 5050 0829 Sweden +46 8 5052 0017 Sweden +46 850 539 728 Sweden +46 8 4468 2488 Sweden +46 8 5016 3827 Sweden +46 8 5050 0828 Sweden Meeting ID: 677 0630 7789 Find your local number: https://stockholmuniversity.zoom.us/u/cbOPX4tSzl Join by SIP 67706307789 at 109.105.112.236 67706307789 at 109.105.112.235 Join by H.323 109.105.112.236 109.105.112.235 Meeting ID: 677 0630 7789 Join by Skype for Business https://stockholmuniversity.zoom.us/skype/67706307789 --------------------------------- André da Silva Schneider Department of Astronomy Stockholm University -------------- next part -------------- An HTML attachment was scrubbed... URL: From andre.schneider at astro.su.se Thu Jun 17 09:11:09 2021 From: andre.schneider at astro.su.se (Andre Schneider) Date: Thu, 17 Jun 2021 07:11:09 +0000 Subject: [Okc-wp4] EO meeting Thu Jun 17 @ 13:15 via Zoom In-Reply-To: References: Message-ID: Reminder of the EO meeting this afternoon. --------------------------------- André da Silva Schneider Department of Astronomy Stockholm University ________________________________ From: Okc-wp4-at-fysik.su.se on behalf of Andre Schneider Sent: Monday, June 14, 2021 4:59:20 PM To: Okc-wp4 at fysik.su.se; people at nordita.org Subject: [Okc-wp4] EO meeting Thu Jun 17 @ 13:15 via Zoom Dear colleagues, our next EO meeting will take place this Thursday Jun 17 at 13:15 via Zoom. To join access https://stockholmuniversity.zoom.us/j/67706307789 You will be able to enter the meeting room from 13:00. See below for other methods to participate. This week Mattia Bulla from Stockholm University will present Title: Let there be light: Illuminating compact object mergers with radiative transfer simulations Abstract: The detection of an electromagnetic counterpart to the gravitational-wave source GW 170817 marked year zero of the multi-messenger gravitational-wave era. This event was generated by the merger of two neutron stars and gave rise to an electromagnetic transient, dubbed a “kilonova”, which was intensively monitored with all the main ground-based and space-borne facilities. In this talk, I will present the code POSSIS and show how radiative transfer simulations can illuminate neutron star merger models and provide a natural connection between models and observational data. I will show how viewing-angle dependent synthetic observables - as light curves, spectra and polarization - can be used to interpret data, place constraints on models and guide future follow-up campaigns of gravitational-wave events. I will end my talk by discussing some recent upgrades to POSSIS. See you then! Andre da Silva Schneider is inviting you to a scheduled Zoom meeting. Topic: EO Meeting Time: Jun 10, 2021 01:00 PM Stockholm Every week on Thu, until Jun 17, 2021, 2 occurrence(s) Jun 10, 2021 01:00 PM Jun 17, 2021 01:00 PM Please download and import the following iCalendar (.ics) files to your calendar system. Weekly: https://stockholmuniversity.zoom.us/meeting/u5Mqd--rrjwtEt1cmpMBiMOcrbyKECFQ-ZCX/ics?icsToken=98tyKu-vqTssGdSStxGOR_MEB4igM-nziGZaj7cMnxL1LgJaTyz1JOBbGZdcNumd Join Zoom Meeting https://stockholmuniversity.zoom.us/j/67706307789 Meeting ID: 677 0630 7789 One tap mobile +46850500829,,67706307789# Sweden +46850520017,,67706307789# Sweden Dial by your location +46 8 5050 0829 Sweden +46 8 5052 0017 Sweden +46 850 539 728 Sweden +46 8 4468 2488 Sweden +46 8 5016 3827 Sweden +46 8 5050 0828 Sweden Meeting ID: 677 0630 7789 Find your local number: https://stockholmuniversity.zoom.us/u/cbOPX4tSzl Join by SIP 67706307789 at 109.105.112.236 67706307789 at 109.105.112.235 Join by H.323 109.105.112.236 109.105.112.235 Meeting ID: 677 0630 7789 Join by Skype for Business https://stockholmuniversity.zoom.us/skype/67706307789 --------------------------------- André da Silva Schneider Department of Astronomy Stockholm University -------------- next part -------------- An HTML attachment was scrubbed... URL: From davide.gizzi at astro.su.se Mon Sep 20 11:15:08 2021 From: davide.gizzi at astro.su.se (Davide Gizzi) Date: Mon, 20 Sep 2021 09:15:08 +0000 Subject: [Okc-wp4] EO meeting: 23rd of September Message-ID: <5ddcaaee93f0459b85a1817b20574f86@astro.su.se> Dear colleagues, our first EO meeting for the fall will take place this Thursday at 13:15 via Zoom. To join access: https://stockholmuniversity.zoom.us/j/67378581617 This week we have Panos Charalampopoulos, PhD student of Giorgos Leloudas from the Technical University of Denmark (DTU) in Copenhagen. He has been working on Tidal Disruption Events (TDEs) observations and he is visiting Stockholm to work with Mattia Bulla on modeling polarization signals from TDEs. He will present his latest work on TDEs observations. Below is title and abstract: Title: Insights into Tidal Disruption Events: a spectroscopic study Abstract: Tidal disruption events (TDEs) occur when a star gets too close to a super-massive black hole (SMBH) lurking in the nucleus of a galaxy and gets ripped apart by the black hole’s strong gravitational field. Stellar debris fall back as a stream which self-intersects, shocks, and forms a rotationally-supported accretion disk. These processes result in a strong luminous transient flare (Lbol ~ 10^{41}-10^{44} erg/s). Spectroscopically, tidal disruption events (TDEs) are characterized by broad (~ 10^{4} km/s) emission lines and show large diversity as well as different line profiles. In this talk, I will present my results of a detailed spectroscopic population study of 16 optical/UV TDEs. After carefully and consistently performing a series of data reduction tasks including host galaxy light subtraction, I study a number of emission lines prominent among TDEs including Hydrogen, Helium and Bowen lines and quantify their evolution with time in terms of line luminosities, velocity widths and velocity offsets. I will discuss discovered time-lags between the continuum and the emission lines, evolution of line luminosities and luminosity ratios with time and with respect to their photometric properties and try explain the large diversity of the spectroscopic features seen in TDEs along with their X-ray properties based on viewing angle effects. Feel free to share the Zoom link with newcomers who are not in the OKC mailing list but who might be interested to the talk. If they want to be added to the mailing list they can send a request to Okc-wp4-join at fysik.su.se. Hope to see you there! Ana Sagués Carracedo & Davide Gizzi -------------- next part -------------- An HTML attachment was scrubbed... URL: From davide.gizzi at astro.su.se Thu Sep 23 08:15:40 2021 From: davide.gizzi at astro.su.se (Davide Gizzi) Date: Thu, 23 Sep 2021 06:15:40 +0000 Subject: [Okc-wp4] EO meeting: 23rd of September In-Reply-To: <5ddcaaee93f0459b85a1817b20574f86@astro.su.se> References: <5ddcaaee93f0459b85a1817b20574f86@astro.su.se> Message-ID: Dear all, a reminder of our EO meeting today at 13:15! Kind Regards Ana Sagués Carracedo & Davide Gizzi ________________________________ From: Davide Gizzi Sent: Monday, September 20, 2021 11:15:08 AM To: Okc-wp4 at fysik.su.se; people at nordita.org Subject: EO meeting: 23rd of September Dear colleagues, our first EO meeting for the fall will take place this Thursday at 13:15 via Zoom. To join access: https://stockholmuniversity.zoom.us/j/67378581617 This week we have Panos Charalampopoulos, PhD student of Giorgos Leloudas from the Technical University of Denmark (DTU) in Copenhagen. He has been working on Tidal Disruption Events (TDEs) observations and he is visiting Stockholm to work with Mattia Bulla on modeling polarization signals from TDEs. He will present his latest work on TDEs observations. Below is title and abstract: Title: Insights into Tidal Disruption Events: a spectroscopic study Abstract: Tidal disruption events (TDEs) occur when a star gets too close to a super-massive black hole (SMBH) lurking in the nucleus of a galaxy and gets ripped apart by the black hole’s strong gravitational field. Stellar debris fall back as a stream which self-intersects, shocks, and forms a rotationally-supported accretion disk. These processes result in a strong luminous transient flare (Lbol ~ 10^{41}-10^{44} erg/s). Spectroscopically, tidal disruption events (TDEs) are characterized by broad (~ 10^{4} km/s) emission lines and show large diversity as well as different line profiles. In this talk, I will present my results of a detailed spectroscopic population study of 16 optical/UV TDEs. After carefully and consistently performing a series of data reduction tasks including host galaxy light subtraction, I study a number of emission lines prominent among TDEs including Hydrogen, Helium and Bowen lines and quantify their evolution with time in terms of line luminosities, velocity widths and velocity offsets. I will discuss discovered time-lags between the continuum and the emission lines, evolution of line luminosities and luminosity ratios with time and with respect to their photometric properties and try explain the large diversity of the spectroscopic features seen in TDEs along with their X-ray properties based on viewing angle effects. Feel free to share the Zoom link with newcomers who are not in the OKC mailing list but who might be interested to the talk. If they want to be added to the mailing list they can send a request to Okc-wp4-join at fysik.su.se. Hope to see you there! Ana Sagués Carracedo & Davide Gizzi -------------- next part -------------- An HTML attachment was scrubbed... URL: From davide.gizzi at astro.su.se Thu Sep 30 09:11:40 2021 From: davide.gizzi at astro.su.se (Davide Gizzi) Date: Thu, 30 Sep 2021 07:11:40 +0000 Subject: [Okc-wp4] EO meeting: 7th of October Message-ID: <95b70abfb70c459c84804b79e96f9ca3@astro.su.se> Dear colleagues, our next EO meeting will take place next Thursday, 7th of October, at 13:15 (CEST) via Zoom. To join access: https://stockholmuniversity.zoom.us/j/67378581617 The speaker is Tamar Faran, a final year Ph.D. student at the Hebrew University of Jerusalem under the supervision of Prof. Re'em Sari, working on high energy phenomena related to stellar explosions. Find below title and abstract of the talk. Title: Shock wave dynamics and breakout in stellar explosions Abstract: Shock waves are ubiquitous in high-energy astrophysics. The first electromagnetic signal observed in different types of stellar explosions, such as supernovae and gamma ray bursts, is released upon emergence of a shock wave from an opaque stellar envelope, enshrouding a central source. The breakout is followed by expansion of the envelope and the release of energy that was deposited there by the shock wave. The escaping radiation shortly after breakout carries direct information on the properties of the progenitors, their surroundings and the explosion, which can be uncovered by confronting observations with analytic models. In this talk I will first present our model for the early phase radiation following a Newtonian shock breakout in core-collapse supernovae. Through a self similar description of the radiation, we deduce a faster evolving and significantly lower radiation temperature than predicted by previous models. Moving on to the relativistic regime, I will discuss a hydrodynamic solution for the interiors of a spherical ultra-relativistic blast wave. I will end with relativistic shock breakout, where the creation of electron-positron pairs play an important role in regulating the photon temperature. I will highlight applications of this work to low luminosity gamma ray bursts and gamma ray emission in neutron star mergers. Hope to see you there! Ana Sagués Carracedo & Davide Gizzi -------------- next part -------------- An HTML attachment was scrubbed... URL: From davide.gizzi at astro.su.se Thu Oct 7 07:46:59 2021 From: davide.gizzi at astro.su.se (Davide Gizzi) Date: Thu, 7 Oct 2021 05:46:59 +0000 Subject: [Okc-wp4] EO meeting: 7th of October In-Reply-To: <95b70abfb70c459c84804b79e96f9ca3@astro.su.se> References: <95b70abfb70c459c84804b79e96f9ca3@astro.su.se> Message-ID: <29150624d7a24891ae6bf2ff3829e134@astro.su.se> Dear all, a kind reminder of the EO meeting today at 13:15. Kind Regards Ana Sagués Carracedo & Davide Gizzi ________________________________ From: Davide Gizzi Sent: Thursday, September 30, 2021 9:11:40 AM To: Okc-wp4 at fysik.su.se; people at nordita.org Cc: tamar.faran at mail.huji.ac.il Subject: EO meeting: 7th of October Dear colleagues, our next EO meeting will take place next Thursday, 7th of October, at 13:15 (CEST) via Zoom. To join access: https://stockholmuniversity.zoom.us/j/67378581617 The speaker is Tamar Faran, a final year Ph.D. student at the Hebrew University of Jerusalem under the supervision of Prof. Re'em Sari, working on high energy phenomena related to stellar explosions. Find below title and abstract of the talk. Title: Shock wave dynamics and breakout in stellar explosions Abstract: Shock waves are ubiquitous in high-energy astrophysics. The first electromagnetic signal observed in different types of stellar explosions, such as supernovae and gamma ray bursts, is released upon emergence of a shock wave from an opaque stellar envelope, enshrouding a central source. The breakout is followed by expansion of the envelope and the release of energy that was deposited there by the shock wave. The escaping radiation shortly after breakout carries direct information on the properties of the progenitors, their surroundings and the explosion, which can be uncovered by confronting observations with analytic models. In this talk I will first present our model for the early phase radiation following a Newtonian shock breakout in core-collapse supernovae. Through a self similar description of the radiation, we deduce a faster evolving and significantly lower radiation temperature than predicted by previous models. Moving on to the relativistic regime, I will discuss a hydrodynamic solution for the interiors of a spherical ultra-relativistic blast wave. I will end with relativistic shock breakout, where the creation of electron-positron pairs play an important role in regulating the photon temperature. I will highlight applications of this work to low luminosity gamma ray bursts and gamma ray emission in neutron star mergers. Hope to see you there! Ana Sagués Carracedo & Davide Gizzi -------------- next part -------------- An HTML attachment was scrubbed... URL: From davide.gizzi at astro.su.se Thu Oct 14 08:54:02 2021 From: davide.gizzi at astro.su.se (Davide Gizzi) Date: Thu, 14 Oct 2021 06:54:02 +0000 Subject: [Okc-wp4] EO meeting: 21st of October Message-ID: <468f183dae1b4d6fbe5b57f5d149758b@astro.su.se> Dear colleagues, our next EO meeting will take place next Thursday, 21st of October, at 13:15 via Zoom. To join access: https://stockholmuniversity.zoom.us/j/67378581617 The speaker is Kunal Deoskar, Ph.D. student in the Elementary Particle Physics division at the Stockholm University and member of the IceCube Neutrino Observatory. He will be talking about his research, which focuses on searching for sources of high energy astrophysical neutrinos, particularly Gamma-ray Bursts as potential candidates. Find below title and abstract of the talk. Title: Search for Neutrinos from Precursors and Afterglows of Gamma-ray Bursts using the IceCube Neutrino Observatory. Abstract: Gamma ray bursts (GRBs) have long been considered as a possible source of ultra high energy cosmic rays, which makes them a promising neutrino source candidate. Previous IceCube searches for neutrino connections with GRBs focused on the prompt phase of the GRB and found no significant correlation between neutrino events and the observed GRBs. This motivates us to extend our search beyond the prompt phase. A model independent search using an unbinned maximum likelihood method is performed to search for muon neutrino correlations with the precursor and afterglow phases of gamma ray bursts and the results are presented. The analysis is applied to a selection of 733 GRBs searching for neutrino detections concurrent with GRB observations separately for the precursor and for the prompt+afterglow emission regions. We obtain the best-fit results for individual GRBs and the final significance for each search is evaluated using binomial tests. Neither of the two searches provides significant evidence of neutrino emission from GRBs during an extended time period up to two weeks before or after the prompt phase of gamma-ray emission. The results are used to establish population limits to determine the contribution of cosmic GRBs to the observed diffuse neutrino flux. Hope to see you there! Ana Sagués Carracedo & Davide Gizzi -------------- next part -------------- An HTML attachment was scrubbed... URL: From davide.gizzi at astro.su.se Thu Oct 21 08:03:39 2021 From: davide.gizzi at astro.su.se (Davide Gizzi) Date: Thu, 21 Oct 2021 06:03:39 +0000 Subject: [Okc-wp4] EO meeting: 21st of October In-Reply-To: <468f183dae1b4d6fbe5b57f5d149758b@astro.su.se> References: <468f183dae1b4d6fbe5b57f5d149758b@astro.su.se> Message-ID: Dear all, a kind reminder of the EO meeting today at 13:15. Kind Regards Ana Sagués Carracedo & Davide Gizzi ________________________________ From: Davide Gizzi Sent: Thursday, October 14, 2021 8:54:02 AM To: Okc-wp4 at fysik.su.se; people at nordita.org Cc: Kunal Deoskar Subject: EO meeting: 21st of October Dear colleagues, our next EO meeting will take place next Thursday, 21st of October, at 13:15 via Zoom. To join access: https://stockholmuniversity.zoom.us/j/67378581617 The speaker is Kunal Deoskar, Ph.D. student in the Elementary Particle Physics division at the Stockholm University and member of the IceCube Neutrino Observatory. He will be talking about his research, which focuses on searching for sources of high energy astrophysical neutrinos, particularly Gamma-ray Bursts as potential candidates. Find below title and abstract of the talk. Title: Search for Neutrinos from Precursors and Afterglows of Gamma-ray Bursts using the IceCube Neutrino Observatory. Abstract: Gamma ray bursts (GRBs) have long been considered as a possible source of ultra high energy cosmic rays, which makes them a promising neutrino source candidate. Previous IceCube searches for neutrino connections with GRBs focused on the prompt phase of the GRB and found no significant correlation between neutrino events and the observed GRBs. This motivates us to extend our search beyond the prompt phase. A model independent search using an unbinned maximum likelihood method is performed to search for muon neutrino correlations with the precursor and afterglow phases of gamma ray bursts and the results are presented. The analysis is applied to a selection of 733 GRBs searching for neutrino detections concurrent with GRB observations separately for the precursor and for the prompt+afterglow emission regions. We obtain the best-fit results for individual GRBs and the final significance for each search is evaluated using binomial tests. Neither of the two searches provides significant evidence of neutrino emission from GRBs during an extended time period up to two weeks before or after the prompt phase of gamma-ray emission. The results are used to establish population limits to determine the contribution of cosmic GRBs to the observed diffuse neutrino flux. Hope to see you there! Ana Sagués Carracedo & Davide Gizzi -------------- next part -------------- An HTML attachment was scrubbed... URL: From davide.gizzi at astro.su.se Thu Oct 28 12:06:35 2021 From: davide.gizzi at astro.su.se (Davide Gizzi) Date: Thu, 28 Oct 2021 10:06:35 +0000 Subject: [Okc-wp4] EO meeting: 4th of November Message-ID: <2b707d57571945489811107b24428c02@astro.su.se> Dear all, our next EO meeting will take place next Thursday, 4th of November, at 13:15 (CET) via Zoom. To join access: https://stockholmuniversity.zoom.us/j/67378581617 The speaker is Eliot Henri Roger Ayache, a postdoc who recently joined Anders Jerkstrand's Supernova group. He did his PhD at the University of Bath (UK) in Hendrik van Eerten's group, working on numerical modeling of GRBs afterglow. His research currently focuses on the late time dynamics and emission of kilonovae, as well as on the kilonova/GRB jet interaction. Below is the title and abstract of the talk. GRB afterglows from early to late times or how to accurately capture non-thermal emission using moving meshes Recent years have seen massive breakthroughs in the observations of gamma-ray bursts and other high-energy astrophysical transients. Dynamical jet simulations have progressed to a point where it is now becoming possible to fully numerically resolve gamma-ray burst (GRB) jet evolution across scales. However, the modeling of radiative emission is currently lagging behind and makes for a bottleneck severely limiting our efforts to fully interpret the physics of GRBs in the multi-messenger era. In this talk, I will present new numerical developments to resolve this discrepancy and focus on providing insights into GRB afterglow physics. Using numerical simulations, we set out to understand the impact of the presence of multiple emission sites on afterglow light curves. We also investigate the trans-relativistic evolution of the jet and poorly understood behaviour of the spectral breaks in the radiation as the jet decelerates. In order to do this, we developed a new method for the local numerical calculation of non-thermal emission in relativistic shocks. This method combines a moving mesh finite-volume code with a local description of particle acceleration and corresponding synchrotron process in a code called GAMMA. The resulting improvements in computational efficiency, and subsequent ability to reach very high spatial resolution, enables the accurate simulation of GRB afterglow spectral evolution from early to late times. Using these simulations, we can: (i) investigate the short timescale variability of GRB afterglow light curves such as the origin of flares, (ii) quantify the expected deviations of the approximate analytical methods for the calculation of emissivity that are currently in use in the GRB afterglow community. Hope to see you there! Ana Sagués Carracedo & Davide Gizzi -------------- next part -------------- An HTML attachment was scrubbed... URL: From davide.gizzi at astro.su.se Thu Nov 4 08:08:30 2021 From: davide.gizzi at astro.su.se (Davide Gizzi) Date: Thu, 4 Nov 2021 07:08:30 +0000 Subject: [Okc-wp4] EO meeting: 4th of November In-Reply-To: <2b707d57571945489811107b24428c02@astro.su.se> References: <2b707d57571945489811107b24428c02@astro.su.se> Message-ID: <4323b7c78e4548529e17b9c497d776b4@astro.su.se> Dear all, a kind reminder of the EO meeting, today at 13:15. Kind regards Ana Sagués Carracedo & Davide Gizzi ________________________________ From: Davide Gizzi Sent: Thursday, October 28, 2021 12:06:35 PM To: Okc-wp4 at fysik.su.se; people at nordita.org Cc: Eliot Henri Roger Ayache Subject: EO meeting: 4th of November Dear all, our next EO meeting will take place next Thursday, 4th of November, at 13:15 (CET) via Zoom. To join access: https://stockholmuniversity.zoom.us/j/67378581617 The speaker is Eliot Henri Roger Ayache, a postdoc who recently joined Anders Jerkstrand's Supernova group. He did his PhD at the University of Bath (UK) in Hendrik van Eerten's group, working on numerical modeling of GRBs afterglow. His research currently focuses on the late time dynamics and emission of kilonovae, as well as on the kilonova/GRB jet interaction. Below is the title and abstract of the talk. GRB afterglows from early to late times or how to accurately capture non-thermal emission using moving meshes Recent years have seen massive breakthroughs in the observations of gamma-ray bursts and other high-energy astrophysical transients. Dynamical jet simulations have progressed to a point where it is now becoming possible to fully numerically resolve gamma-ray burst (GRB) jet evolution across scales. However, the modeling of radiative emission is currently lagging behind and makes for a bottleneck severely limiting our efforts to fully interpret the physics of GRBs in the multi-messenger era. In this talk, I will present new numerical developments to resolve this discrepancy and focus on providing insights into GRB afterglow physics. Using numerical simulations, we set out to understand the impact of the presence of multiple emission sites on afterglow light curves. We also investigate the trans-relativistic evolution of the jet and poorly understood behaviour of the spectral breaks in the radiation as the jet decelerates. In order to do this, we developed a new method for the local numerical calculation of non-thermal emission in relativistic shocks. This method combines a moving mesh finite-volume code with a local description of particle acceleration and corresponding synchrotron process in a code called GAMMA. The resulting improvements in computational efficiency, and subsequent ability to reach very high spatial resolution, enables the accurate simulation of GRB afterglow spectral evolution from early to late times. Using these simulations, we can: (i) investigate the short timescale variability of GRB afterglow light curves such as the origin of flares, (ii) quantify the expected deviations of the approximate analytical methods for the calculation of emissivity that are currently in use in the GRB afterglow community. Hope to see you there! Ana Sagués Carracedo & Davide Gizzi -------------- next part -------------- An HTML attachment was scrubbed... URL: From ana.sagues-carracedo at fysik.su.se Thu Nov 4 12:25:33 2021 From: ana.sagues-carracedo at fysik.su.se (=?utf-8?B?QW5hIFNhZ3XDqXMgQ2FycmFjZWRv?=) Date: Thu, 4 Nov 2021 11:25:33 +0000 Subject: [Okc-wp4] EO meeting: 4th of November In-Reply-To: <4323b7c78e4548529e17b9c497d776b4@astro.su.se> References: <2b707d57571945489811107b24428c02@astro.su.se> <4323b7c78e4548529e17b9c497d776b4@astro.su.se> Message-ID: <01D3E098-2FF0-457A-B92F-1FDA9472043F@fysik.su.se> Hi, I see some people is joining the zoom link already. I want to clarify that the meeting starts ~50 minutes from now. Sweden just ended their daylight savings last weekend. See you all soon, Ana On 4 Nov 2021, at 08:08, Davide Gizzi > wrote: Dear all, a kind reminder of the EO meeting, today at 13:15. Kind regards Ana Sagués Carracedo & Davide Gizzi ________________________________ From: Davide Gizzi Sent: Thursday, October 28, 2021 12:06:35 PM To: Okc-wp4 at fysik.su.se; people at nordita.org Cc: Eliot Henri Roger Ayache Subject: EO meeting: 4th of November Dear all, our next EO meeting will take place next Thursday, 4th of November, at 13:15 (CET) via Zoom. To join access: https://stockholmuniversity.zoom.us/j/67378581617 The speaker is Eliot Henri Roger Ayache, a postdoc who recently joined Anders Jerkstrand's Supernova group. He did his PhD at the University of Bath (UK) in Hendrik van Eerten's group, working on numerical modeling of GRBs afterglow. His research currently focuses on the late time dynamics and emission of kilonovae, as well as on the kilonova/GRB jet interaction. Below is the title and abstract of the talk. GRB afterglows from early to late times or how to accurately capture non-thermal emission using moving meshes Recent years have seen massive breakthroughs in the observations of gamma-ray bursts and other high-energy astrophysical transients. Dynamical jet simulations have progressed to a point where it is now becoming possible to fully numerically resolve gamma-ray burst (GRB) jet evolution across scales. However, the modeling of radiative emission is currently lagging behind and makes for a bottleneck severely limiting our efforts to fully interpret the physics of GRBs in the multi-messenger era. In this talk, I will present new numerical developments to resolve this discrepancy and focus on providing insights into GRB afterglow physics. Using numerical simulations, we set out to understand the impact of the presence of multiple emission sites on afterglow light curves. We also investigate the trans-relativistic evolution of the jet and poorly understood behaviour of the spectral breaks in the radiation as the jet decelerates. In order to do this, we developed a new method for the local numerical calculation of non-thermal emission in relativistic shocks. This method combines a moving mesh finite-volume code with a local description of particle acceleration and corresponding synchrotron process in a code called GAMMA. The resulting improvements in computational efficiency, and subsequent ability to reach very high spatial resolution, enables the accurate simulation of GRB afterglow spectral evolution from early to late times. Using these simulations, we can: (i) investigate the short timescale variability of GRB afterglow light curves such as the origin of flares, (ii) quantify the expected deviations of the approximate analytical methods for the calculation of emissivity that are currently in use in the GRB afterglow community. Hope to see you there! Ana Sagués Carracedo & Davide Gizzi ------------------------------------------------- okc-wp4 at albanova.se mailing list -------------- next part -------------- An HTML attachment was scrubbed... URL: From ana.sagues-carracedo at fysik.su.se Thu Nov 11 14:08:04 2021 From: ana.sagues-carracedo at fysik.su.se (=?utf-8?B?QW5hIFNhZ3XDqXMgQ2FycmFjZWRv?=) Date: Thu, 11 Nov 2021 13:08:04 +0000 Subject: [Okc-wp4] EO meeting: 18th November Message-ID: <8EE5DE5F-BCD5-4017-953E-497B22B4A0E5@fysik.su.se> Dear all, Our next EO meeting will take place next Thursday, 18th of November, at 13:15 (CET) via Zoom. To join access: https://stockholmuniversity.zoom.us/j/67378581617 The speaker is Lorentzo Nativi. Most of you should know him, he is a PhD student working with Stephan Rosswog at the OKC. He will tell us about his latest paper: https://arxiv.org/pdf/2109.00814.pdf Below is the title and abstract of the talk. Investigating the jet-ejecta interaction in neutron star mergers GW170817 represented the first detection of a binary neutron star merger, and the coalescence of the two neutron stars was followed by both the ejection of neutron-rich material and the launch of a relativistic jet. These two dynamical components, mildly-relativistic ejecta, and ultra-relativistic outflow, were detected independently: the first one powered a "macronova" (or "kilonova"), a thermal transient produced by the radioactive decay of the freshly synthesized r-process nuclei. The jet instead powered a short GRB consisting of an early gamma-ray signal followed by a multi-wavelength afterglow. The presence of a jet successfully breaking out from the ejecta was additionally confirmed by the detection of superluminal motion. These two components were detected and modelled independently, but they interact before becoming visible, and this might have left an imprint on the detected signals. I will discuss the results of the 3D special-relativistic simulations used to investigate the consequences of a jet propagating through a realistic environment, created by a neutrino-driven wind around the central remnant. I will show how a jet can "punch-away" a fraction of high-opacity material at early times, before the brightening of the macronova, and how this is going to impact the observed signal. Then I will show what happens in the other direction i.e., how the ejecta impact the jet. I will show that the emerging jets are mostly shaped by their interaction with the surrounding environment and their eventual initial structures only plays a minor role (but non negligible) in the final outcome. Hope to see you there! Ana Sagués Carracedo & Davide Gizzi -------------- next part -------------- An HTML attachment was scrubbed... URL: From ana.sagues-carracedo at fysik.su.se Thu Nov 11 14:08:06 2021 From: ana.sagues-carracedo at fysik.su.se (=?utf-8?B?QW5hIFNhZ3XDqXMgQ2FycmFjZWRv?=) Date: Thu, 11 Nov 2021 13:08:06 +0000 Subject: [Okc-wp4] EO meeting: 18th November Message-ID: Dear all, Our next EO meeting will take place next Thursday, 18th of November, at 13:15 (CET) via Zoom. To join access: https://stockholmuniversity.zoom.us/j/67378581617 The speaker is Lorentzo Nativi. Most of you should know him, he is a PhD student working with Stephan Rosswog at the OKC. He will tell us about his latest paper: https://arxiv.org/pdf/2109.00814.pdf Below is the title and abstract of the talk. Investigating the jet-ejecta interaction in neutron star mergers GW170817 represented the first detection of a binary neutron star merger, and the coalescence of the two neutron stars was followed by both the ejection of neutron-rich material and the launch of a relativistic jet. These two dynamical components, mildly-relativistic ejecta, and ultra-relativistic outflow, were detected independently: the first one powered a "macronova" (or "kilonova"), a thermal transient produced by the radioactive decay of the freshly synthesized r-process nuclei. The jet instead powered a short GRB consisting of an early gamma-ray signal followed by a multi-wavelength afterglow. The presence of a jet successfully breaking out from the ejecta was additionally confirmed by the detection of superluminal motion. These two components were detected and modelled independently, but they interact before becoming visible, and this might have left an imprint on the detected signals. I will discuss the results of the 3D special-relativistic simulations used to investigate the consequences of a jet propagating through a realistic environment, created by a neutrino-driven wind around the central remnant. I will show how a jet can "punch-away" a fraction of high-opacity material at early times, before the brightening of the macronova, and how this is going to impact the observed signal. Then I will show what happens in the other direction i.e., how the ejecta impact the jet. I will show that the emerging jets are mostly shaped by their interaction with the surrounding environment and their eventual initial structures only plays a minor role (but non negligible) in the final outcome. Hope to see you there! Ana Sagués Carracedo & Davide Gizzi -------------- next part -------------- An HTML attachment was scrubbed... URL: From ana.sagues-carracedo at fysik.su.se Thu Nov 11 14:08:25 2021 From: ana.sagues-carracedo at fysik.su.se (=?iso-8859-1?Q?Ana_Sagu=E9s_Carracedo?=) Date: Thu, 11 Nov 2021 13:08:25 +0000 Subject: [Okc-wp4] Recording EO meeting 4th November Message-ID: Hello again everyone, For those of you interested. Here the link where you can find the recording from our last meeting on the 4th of Nov with a talk by Eliot Henri Roger Ayache on GRB afterglows from early to late times or how to accurately capture non-thermal emission using moving meshes. https://su.drive.sunet.se/index.php/s/wc3LY4r4K5Fz8Lp Cheers, Ana -------------- next part -------------- An HTML attachment was scrubbed... URL: From davide.gizzi at astro.su.se Thu Nov 18 08:01:45 2021 From: davide.gizzi at astro.su.se (Davide Gizzi) Date: Thu, 18 Nov 2021 07:01:45 +0000 Subject: [Okc-wp4] EO meeting: 18th November In-Reply-To: References: Message-ID: <0fdbe811275b4fbcb821d1f3c71fea4e@astro.su.se> Dear all, a kind reminder of the EO meeting, today at 13:15. Before the beginning of the talk, we would like to give some information regarding our task as Extreme Object group during the OKC day of next week. For this reason, we kindly ask the people who are part of the Extreme Object working group (especially newcomers) to join the meeting 5 minutes earlier. Kind regards Ana Sagués Carracedo & Davide Gizzi ________________________________ From: Ana Sagués Carracedo Sent: Thursday, November 11, 2021 2:08:06 PM To: Okc-wp4 at fysik.su.se Cc: Davide Gizzi Subject: EO meeting: 18th November Dear all, Our next EO meeting will take place next Thursday, 18th of November, at 13:15 (CET) via Zoom. To join access: https://stockholmuniversity.zoom.us/j/67378581617 The speaker is Lorentzo Nativi. Most of you should know him, he is a PhD student working with Stephan Rosswog at the OKC. He will tell us about his latest paper: https://arxiv.org/pdf/2109.00814.pdf Below is the title and abstract of the talk. Investigating the jet-ejecta interaction in neutron star mergers GW170817 represented the first detection of a binary neutron star merger, and the coalescence of the two neutron stars was followed by both the ejection of neutron-rich material and the launch of a relativistic jet. These two dynamical components, mildly-relativistic ejecta, and ultra-relativistic outflow, were detected independently: the first one powered a "macronova" (or "kilonova"), a thermal transient produced by the radioactive decay of the freshly synthesized r-process nuclei. The jet instead powered a short GRB consisting of an early gamma-ray signal followed by a multi-wavelength afterglow. The presence of a jet successfully breaking out from the ejecta was additionally confirmed by the detection of superluminal motion. These two components were detected and modelled independently, but they interact before becoming visible, and this might have left an imprint on the detected signals. I will discuss the results of the 3D special-relativistic simulations used to investigate the consequences of a jet propagating through a realistic environment, created by a neutrino-driven wind around the central remnant. I will show how a jet can "punch-away" a fraction of high-opacity material at early times, before the brightening of the macronova, and how this is going to impact the observed signal. Then I will show what happens in the other direction i.e., how the ejecta impact the jet. I will show that the emerging jets are mostly shaped by their interaction with the surrounding environment and their eventual initial structures only plays a minor role (but non negligible) in the final outcome. Hope to see you there! Ana Sagués Carracedo & Davide Gizzi -------------- next part -------------- An HTML attachment was scrubbed... URL: From davide.gizzi at astro.su.se Wed Nov 24 13:45:31 2021 From: davide.gizzi at astro.su.se (Davide Gizzi) Date: Wed, 24 Nov 2021 12:45:31 +0000 Subject: [Okc-wp4] EO meeting: 2nd of December Message-ID: <49cc319c7bd24371bb60b944b433ba40@astro.su.se> Dear colleagues, our next EO meeting will take place on Thursday 2nd of December, at 13:15 (CET) via Zoom. To join access: https://stockholmuniversity.zoom.us/j/67378581617 The speaker is Rachel Bruch, PhD student at the Weizmann Institute of Science in Israel, working with Pr. Avishay Gal-Yam since 2018. The team at Weizmann leads the effort within ZTF to gather supernovae in their infancy and initiate rapid spectroscopic follow-up. They are also involved in the SOXS collaboration, building the optical part of the spectrograph. Below is title and abstract of the talk. Flash spectroscopy and the environment of massive stars: what we can learn from the first week of a supernova. Flash spectroscopy results from a brief and strong illumination of circumstellar material shortly after the explosion of a massive star, which induces emission lines of highly ionised species such as He II, N III and C III. These emission lines usually disappear within a few days after explosion, making observations difficult. They are however a unique and reliable marker for probing the presence of CSM around supernova progenitors. With the advent of modern astronomical surveys (such as ZTF), we looked for supernovae within a <2.5d from explosion and gathered a sample of SN II with such early-time spectroscopy. We measured how common are flash features, finding that 60% (>30% ay 95% CL) of SN II show flash ionisation features. In this talk, I will review the observational campaign to find flash ionisation features and introduce the new questions arising from this search. Next EO meetings: 9th of December: Smaranika Banerjee, Tohoku University, Japan 16th of December: Bhaskar Biswas, Stockholm University, Sweden Hope to see you there! Ana Sagués Carracedo & Davide Gizzi -------------- next part -------------- An HTML attachment was scrubbed... URL: From stephan.rosswog at astro.su.se Thu Nov 25 12:18:15 2021 From: stephan.rosswog at astro.su.se (Stephan Rosswog) Date: Thu, 25 Nov 2021 11:18:15 +0000 Subject: [Okc-wp4] Informal end-of-the-year-update on modelling MM-events Message-ID: Dear all I hope you are doing fine in these dark and pandemic times.... I think that it would be good to have an update/virtual get-together on our **modelling efforts on multi-messenger astrophysics**. Everybody who is interested is more than welcome to join the meeting, but I would like to keep the focus on the theoretical modelling. I understand that there has been substantial progress since last summer and we have "accreted" further experts on various aspects of these complex phenomena (I am aware of Haakon Andresen (equation of state effects in CC-supernovae), Eliot Ayache [radiation modelling of GRBs], Bhaskar Biswas [infering nuclear matter properties from multi-messenger observations], Nikil Sarin [observational consequences of BNS mergers], but there may be more new scientists that I have not met yet...if you feel that you are one them, please introduce yourself!). Therefore it makes a lot of sense to have an informal get-together to meet the new (or not so new) collaborators and to understand what drives them... The idea is to have an afternoon with short, very informal talks with plenty of time for questions. Unfortunately, the end of the year is an exceptionally busy time of the year for most of us and therefore it may be a challenge to find an afternoon that works for everybody. We should nevertheless try... Here are some suggestions for time slots, please indicate times that would work for you: https://whenisgood.net/jchg3sc (also joining for only part of the afternoon is fine, of course). Hope we find a suitable date... All the best and stay healthy! Stephan P.S. Please feel free to forward this message to anyone at OKC that you think may be interested. ---------------------------------------------- Prof. Dr. Stephan Rosswog Computational High-Energy Astrophysics The Oskar Klein Centre for Cosmoparticle Physics Department of Astronomy, Stockholm University AlbaNova, Roslagstullbacken 21 SE-10691 Stockholm, Sweden Email: stephan.rosswog at astro.su.se Tel.: +46 (0)8 5537 8529 URL: http://compact-merger.astro.su.se/ -------------- next part -------------- An HTML attachment was scrubbed... URL: From davide.gizzi at astro.su.se Thu Dec 2 08:03:35 2021 From: davide.gizzi at astro.su.se (Davide Gizzi) Date: Thu, 2 Dec 2021 07:03:35 +0000 Subject: [Okc-wp4] EO meeting: 2nd of December In-Reply-To: <49cc319c7bd24371bb60b944b433ba40@astro.su.se> References: <49cc319c7bd24371bb60b944b433ba40@astro.su.se> Message-ID: <0bdeebb7ae30482982dd39d82d4bd7d0@astro.su.se> Dear all, a kind reminder of today's EO meeting at 13:15 (CET). Kind regards Ana Sagués Carracedo & Davide Gizzi ________________________________ From: Davide Gizzi Sent: Wednesday, November 24, 2021 1:45:31 PM To: Okc-wp4 at fysik.su.se; people at nordita.org Cc: rachel.bruch at weizmann.ac.il Subject: EO meeting: 2nd of December Dear colleagues, our next EO meeting will take place on Thursday 2nd of December, at 13:15 (CET) via Zoom. To join access: https://stockholmuniversity.zoom.us/j/67378581617 The speaker is Rachel Bruch, PhD student at the Weizmann Institute of Science in Israel, working with Pr. Avishay Gal-Yam since 2018. The team at Weizmann leads the effort within ZTF to gather supernovae in their infancy and initiate rapid spectroscopic follow-up. They are also involved in the SOXS collaboration, building the optical part of the spectrograph. Below is title and abstract of the talk. Flash spectroscopy and the environment of massive stars: what we can learn from the first week of a supernova. Flash spectroscopy results from a brief and strong illumination of circumstellar material shortly after the explosion of a massive star, which induces emission lines of highly ionised species such as He II, N III and C III. These emission lines usually disappear within a few days after explosion, making observations difficult. They are however a unique and reliable marker for probing the presence of CSM around supernova progenitors. With the advent of modern astronomical surveys (such as ZTF), we looked for supernovae within a <2.5d from explosion and gathered a sample of SN II with such early-time spectroscopy. We measured how common are flash features, finding that 60% (>30% ay 95% CL) of SN II show flash ionisation features. In this talk, I will review the observational campaign to find flash ionisation features and introduce the new questions arising from this search. Next EO meetings: 9th of December: Smaranika Banerjee, Tohoku University, Japan 16th of December: Bhaskar Biswas, Stockholm University, Sweden Hope to see you there! Ana Sagués Carracedo & Davide Gizzi -------------- next part -------------- An HTML attachment was scrubbed... URL: From stephan.rosswog at astro.su.se Thu Dec 2 09:36:42 2021 From: stephan.rosswog at astro.su.se (Stephan Rosswog) Date: Thu, 2 Dec 2021 08:36:42 +0000 Subject: [Okc-wp4] Informal end-of-the-year-update on modelling MM-events In-Reply-To: References: Message-ID: <05C8831E-1905-475A-B479-EEBC8D7E60DD@astro.su.se> Dear all a kind reminder to fill is the below “when is good”. All the best Stephan On 25 Nov 2021, at 12:18, Stephan Rosswog > wrote: Dear all I hope you are doing fine in these dark and pandemic times.... I think that it would be good to have an update/virtual get-together on our **modelling efforts on multi-messenger astrophysics**. Everybody who is interested is more than welcome to join the meeting, but I would like to keep the focus on the theoretical modelling. I understand that there has been substantial progress since last summer and we have "accreted" further experts on various aspects of these complex phenomena (I am aware of Haakon Andresen (equation of state effects in CC-supernovae), Eliot Ayache [radiation modelling of GRBs], Bhaskar Biswas [infering nuclear matter properties from multi-messenger observations], Nikil Sarin [observational consequences of BNS mergers], but there may be more new scientists that I have not met yet...if you feel that you are one them, please introduce yourself!). Therefore it makes a lot of sense to have an informal get-together to meet the new (or not so new) collaborators and to understand what drives them... The idea is to have an afternoon with short, very informal talks with plenty of time for questions. Unfortunately, the end of the year is an exceptionally busy time of the year for most of us and therefore it may be a challenge to find an afternoon that works for everybody. We should nevertheless try... Here are some suggestions for time slots, please indicate times that would work for you: https://whenisgood.net/jchg3sc (also joining for only part of the afternoon is fine, of course). Hope we find a suitable date... All the best and stay healthy! Stephan P.S. Please feel free to forward this message to anyone at OKC that you think may be interested. ---------------------------------------------- Prof. Dr. Stephan Rosswog Computational High-Energy Astrophysics The Oskar Klein Centre for Cosmoparticle Physics Department of Astronomy, Stockholm University AlbaNova, Roslagstullbacken 21 SE-10691 Stockholm, Sweden Email: stephan.rosswog at astro.su.se Tel.: +46 (0)8 5537 8529 URL: http://compact-merger.astro.su.se/ ---------------------------------------------- Prof. Dr. Stephan Rosswog Computational High-Energy Astrophysics The Oskar Klein Centre for Cosmoparticle Physics Department of Astronomy, Stockholm University AlbaNova, Roslagstullbacken 21 SE-10691 Stockholm, Sweden Email: stephan.rosswog at astro.su.se Tel.: +46 (0)8 5537 8529 URL: http://compact-merger.astro.su.se/ -------------- next part -------------- An HTML attachment was scrubbed... URL: From stephan.rosswog at astro.su.se Fri Dec 3 17:27:04 2021 From: stephan.rosswog at astro.su.se (Stephan Rosswog) Date: Fri, 3 Dec 2021 16:27:04 +0000 Subject: [Okc-wp4] Informal end-of-the-year-update on modelling MM-events In-Reply-To: References: Message-ID: <050986F5-F90C-486D-A0B9-99A3EE9F5682@astro.su.se> Dear all as (unfortunately) expected, this is a busy time and none of the time slots fits eeverybody. The best slot seems to be Friday 10, so let’s go for it. Sorry to all those who cannot make it, but you’ll be again most welcome in the next meeting (spring). It would be great if all groups can give some quick update on the most interesting developments to potentially identify collaboration possibilities. We can keep this pretty informal with cookies and coffee (but via zoom)… All the best and I’ll come back when the program is clearer, for now just block Friday afternoon, starting at 13:00. Cheers and have a nice weekend Stephan On 25 Nov 2021, at 12:18, Stephan Rosswog > wrote: Dear all I hope you are doing fine in these dark and pandemic times.... I think that it would be good to have an update/virtual get-together on our **modelling efforts on multi-messenger astrophysics**. Everybody who is interested is more than welcome to join the meeting, but I would like to keep the focus on the theoretical modelling. I understand that there has been substantial progress since last summer and we have "accreted" further experts on various aspects of these complex phenomena (I am aware of Haakon Andresen (equation of state effects in CC-supernovae), Eliot Ayache [radiation modelling of GRBs], Bhaskar Biswas [infering nuclear matter properties from multi-messenger observations], Nikil Sarin [observational consequences of BNS mergers], but there may be more new scientists that I have not met yet...if you feel that you are one them, please introduce yourself!). Therefore it makes a lot of sense to have an informal get-together to meet the new (or not so new) collaborators and to understand what drives them... The idea is to have an afternoon with short, very informal talks with plenty of time for questions. Unfortunately, the end of the year is an exceptionally busy time of the year for most of us and therefore it may be a challenge to find an afternoon that works for everybody. We should nevertheless try... Here are some suggestions for time slots, please indicate times that would work for you: https://whenisgood.net/jchg3sc (also joining for only part of the afternoon is fine, of course). Hope we find a suitable date... All the best and stay healthy! Stephan P.S. Please feel free to forward this message to anyone at OKC that you think may be interested. ---------------------------------------------- Prof. Dr. Stephan Rosswog Computational High-Energy Astrophysics The Oskar Klein Centre for Cosmoparticle Physics Department of Astronomy, Stockholm University AlbaNova, Roslagstullbacken 21 SE-10691 Stockholm, Sweden Email: stephan.rosswog at astro.su.se Tel.: +46 (0)8 5537 8529 URL: http://compact-merger.astro.su.se/ ------------------------------------------------- okc-wp4 at albanova.se mailing list ---------------------------------------------- Prof. Dr. Stephan Rosswog Computational High-Energy Astrophysics The Oskar Klein Centre for Cosmoparticle Physics Department of Astronomy, Stockholm University AlbaNova, Roslagstullbacken 21 SE-10691 Stockholm, Sweden Email: stephan.rosswog at astro.su.se Tel.: +46 (0)8 5537 8529 URL: http://compact-merger.astro.su.se/ -------------- next part -------------- An HTML attachment was scrubbed... URL: From ana.sagues-carracedo at fysik.su.se Fri Dec 3 16:34:15 2021 From: ana.sagues-carracedo at fysik.su.se (=?utf-8?B?QW5hIFNhZ3XDqXMgQ2FycmFjZWRv?=) Date: Fri, 3 Dec 2021 15:34:15 +0000 Subject: [Okc-wp4] EO Mission statement comments deadline 8th Dec! Message-ID: <89F325D3-0248-4FA0-B440-784CF06E690E@fysik.su.se> Hello everyone, Most of you were present during the OKC day discussion, where we worked on the mission statement for the Extreme Object working group for the next 5 years. We came out with a nice slide where we added: * The SCOPE: a general goal that should include everyone's interest within the EO group. * A HOW: with more specific ideas of how we will achieve the great science that we aim. We plan to send the final version by the end of next week. Before that, we want some interactions with you first. If you have any question, comments or suggestions to improve the document or feel that your science interest within the EO is not well represented here, please send me an email by Wednesday next week (8th Dec). We will share the final version next Thursday, and if there are no significant complaints, send it to Emily, and she will make it public at the OKC webpage. Kind regards, Ana Sagués Carracedo & Davide Gizzi & Evan O’Connor & Stephan Rosswog -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Extreme Objects WG Mission Statement.pdf Type: application/pdf Size: 428937 bytes Desc: Extreme Objects WG Mission Statement.pdf URL: From davide.gizzi at astro.su.se Mon Dec 6 08:23:55 2021 From: davide.gizzi at astro.su.se (Davide Gizzi) Date: Mon, 6 Dec 2021 07:23:55 +0000 Subject: [Okc-wp4] EO meeting: 9th of December Message-ID: Dear all, our next EO meeting will take place this Thursday, 9th of December, at 13:15 (CET) via Zoom. To join access: https://stockholmuniversity.zoom.us/j/67378581617 The speaker is Smaranika Banerjee, PhD candidate in Tohoku University, Japan. She is currently working on the theoretical modeling of kilonova from neutron star mergers, focusing on its early phase. Below is title and abstract of the talk. Title: The early-time kilonova emission from neutron star mergers Abstract: The origin of elements heavier than iron has long been predicted to be the binary neutron star merger. In the neutron-rich material ejected from the binary neutron star merger, heavy elements are synthesized via rapid neutron capture (r-process). The radioactive decay of such elements produces emission in the ultraviolet-optical-infrared (UVOIR) range, called a kilonova (Li and Paczynsky 1998, ApJ). The first UVOIR signal from the binary neutron star merger was detected by the follow-up observation of the gravitational wave event GW170817. Although the radioactive decay of the heavy elements is confirmed to be the source of the UVOIR observation at late time, the emission mechanism of the bright UV and blue emission detected in the early time (t < 1 day) did not reach a consensus. Understanding the entire kilonova light curve is essential to understanding the origin of the heavy elements. In my talk, I will give a general overview of kilonova and share some of our recent progress of modelling the kilonova at an early time. Hope to see you there! Ana Sagués Carracedo & Davide Gizzi -------------- next part -------------- An HTML attachment was scrubbed... URL: From stephan.rosswog at astro.su.se Mon Dec 6 16:51:38 2021 From: stephan.rosswog at astro.su.se (Stephan Rosswog) Date: Mon, 6 Dec 2021 15:51:38 +0000 Subject: [Okc-wp4] Transient modelling meeting shifted to Monday 13, 14-17 Message-ID: Dear all we have a thesis group meeting where the only possible slot is Friday 10, so unfortunately we have to re-schedule the planned transient modelling meeting to Monday 13, sorry for this re-scheduling… So new date: Monday 13, between 14 and 17. More on the program will follow. Cheers Stephan ---------------------------------------------- Prof. Dr. Stephan Rosswog Computational High-Energy Astrophysics The Oskar Klein Centre for Cosmoparticle Physics Department of Astronomy, Stockholm University AlbaNova, Roslagstullbacken 21 SE-10691 Stockholm, Sweden Email: stephan.rosswog at astro.su.se Tel.: +46 (0)8 5537 8529 URL: http://compact-merger.astro.su.se/ From stephan.rosswog at astro.su.se Wed Dec 8 20:24:20 2021 From: stephan.rosswog at astro.su.se (Stephan Rosswog) Date: Wed, 8 Dec 2021 19:24:20 +0000 Subject: [Okc-wp4] Transient modelling meeting Monday 13, 14-17 In-Reply-To: References: Message-ID: Dear all a rough suggested schedule for Monday (let’s keep this a bit flexible): 14:00 - 14:15: Nikhil Sarin (Nordita): introduces himself/his science 14:20 - 14:40: Anders' group update 14:45 - 15:05: Felix' group update 15:10 - 15:30: Evan's group update 15:35 - 15:55: Stephan's group update 16:00 - 16:15: Oleg Korobkin + Ryan Wollaeger (close collaborators at LANL): update/status transient modelling Please make yourself feel comfortable with coffee, cookies etc. The main purpose is to exchange news/ideas and get to know each other rather than super-polished talks. Please make sure new people have a slot to introduce themselves. I will send the link just before the meeting. All the best Stephan On 6 Dec 2021, at 16:51, Stephan Rosswog > wrote: Dear all we have a thesis group meeting where the only possible slot is Friday 10, so unfortunately we have to re-schedule the planned transient modelling meeting to Monday 13, sorry for this re-scheduling… So new date: Monday 13, between 14 and 17. More on the program will follow. Cheers Stephan ---------------------------------------------- Prof. Dr. Stephan Rosswog Computational High-Energy Astrophysics The Oskar Klein Centre for Cosmoparticle Physics Department of Astronomy, Stockholm University AlbaNova, Roslagstullbacken 21 SE-10691 Stockholm, Sweden Email: stephan.rosswog at astro.su.se Tel.: +46 (0)8 5537 8529 URL: http://compact-merger.astro.su.se/ ---------------------------------------------- Prof. Dr. Stephan Rosswog Computational High-Energy Astrophysics The Oskar Klein Centre for Cosmoparticle Physics Department of Astronomy, Stockholm University AlbaNova, Roslagstullbacken 21 SE-10691 Stockholm, Sweden Email: stephan.rosswog at astro.su.se Tel.: +46 (0)8 5537 8529 URL: http://compact-merger.astro.su.se/ -------------- next part -------------- An HTML attachment was scrubbed... URL: From davide.gizzi at astro.su.se Thu Dec 9 08:18:56 2021 From: davide.gizzi at astro.su.se (Davide Gizzi) Date: Thu, 9 Dec 2021 07:18:56 +0000 Subject: [Okc-wp4] EO meeting: 9th of December In-Reply-To: References: Message-ID: Dear all, a kind reminder of today's EO meeting at 13:15 (CET). Kind regards Ana Sagués Carracedo & Davide Gizzi ________________________________ From: Davide Gizzi Sent: Monday, December 6, 2021 8:23:55 AM To: Okc-wp4 at fysik.su.se; people at nordita.org Cc: Smaranika Subject: EO meeting: 9th of December Dear all, our next EO meeting will take place this Thursday, 9th of December, at 13:15 (CET) via Zoom. To join access: https://stockholmuniversity.zoom.us/j/67378581617 The speaker is Smaranika Banerjee, PhD candidate in Tohoku University, Japan. She is currently working on the theoretical modeling of kilonova from neutron star mergers, focusing on its early phase. Below is title and abstract of the talk. Title: The early-time kilonova emission from neutron star mergers Abstract: The origin of elements heavier than iron has long been predicted to be the binary neutron star merger. In the neutron-rich material ejected from the binary neutron star merger, heavy elements are synthesized via rapid neutron capture (r-process). The radioactive decay of such elements produces emission in the ultraviolet-optical-infrared (UVOIR) range, called a kilonova (Li and Paczynsky 1998, ApJ). The first UVOIR signal from the binary neutron star merger was detected by the follow-up observation of the gravitational wave event GW170817. Although the radioactive decay of the heavy elements is confirmed to be the source of the UVOIR observation at late time, the emission mechanism of the bright UV and blue emission detected in the early time (t < 1 day) did not reach a consensus. Understanding the entire kilonova light curve is essential to understanding the origin of the heavy elements. In my talk, I will give a general overview of kilonova and share some of our recent progress of modelling the kilonova at an early time. Hope to see you there! Ana Sagués Carracedo & Davide Gizzi -------------- next part -------------- An HTML attachment was scrubbed... URL: From davide.gizzi at astro.su.se Mon Dec 13 13:44:40 2021 From: davide.gizzi at astro.su.se (Davide Gizzi) Date: Mon, 13 Dec 2021 12:44:40 +0000 Subject: [Okc-wp4] EO meeting: 16th of December Message-ID: <53df8fdb15f6448097ab751bcdbd2e1d@astro.su.se> Dear all, our last EO meeting before the Christmas break will take place this Thursday, 16th of December, at 13:15 (CET) via Zoom. To join access: https://stockholmuniversity.zoom.us/j/67378581617 The speaker is Bhaskar Biswas, a new postdoc in Stephan Rosswog's group. He will be talking about the research he carried out during his PhD at IUCAA (Pune, India), focused on constraining the neutron star equation of state from astrophysical observations. Below is title and abstract of the talk. Title: Constraining the equation of state of neutron stars using multimessenger observations Abstract: Neutron Stars are the densest objects known in nature. They are observed in multiple electromagnetic bands and recently detected also in the gravitational waves as the binary neutron star merger event GW170817. These observations have led to increase in our understanding of the properties of their interiors, environments and evolution. In this lecture the speaker will talk about the current understanding of the neutron star equation of state combining all the available astrophysical observations. Hope to see you there! Ana Sagués Carracedo & Davide Gizzi -------------- next part -------------- An HTML attachment was scrubbed... URL: From stephan.rosswog at astro.su.se Mon Dec 13 13:46:32 2021 From: stephan.rosswog at astro.su.se (Stephan Rosswog) Date: Mon, 13 Dec 2021 12:46:32 +0000 Subject: [Okc-wp4] Meeting Message-ID: Join Zoom Meeting https://stockholmuniversity.zoom.us/j/63927731796 Meeting ID: 639 2773 1796 One tap mobile +46844682488,,63927731796# Sweden +46850163827,,63927731796# Sweden Dial by your location +46 8 4468 2488 Sweden +46 8 5016 3827 Sweden +46 8 5050 0828 Sweden +46 8 5050 0829 Sweden +46 8 5052 0017 Sweden +46 850 539 728 Sweden Meeting ID: 639 2773 1796 Find your local number: https://stockholmuniversity.zoom.us/u/cdlTpSLE8 Join by SIP 63927731796 at 109.105.112.236 63927731796 at 109.105.112.235 Join by H.323 109.105.112.236 109.105.112.235 Meeting ID: 639 2773 1796 Join by Skype for Business https://stockholmuniversity.zoom.us/skype/63927731796 ---------------------------------------------- Prof. Dr. Stephan Rosswog Computational High-Energy Astrophysics The Oskar Klein Centre for Cosmoparticle Physics Department of Astronomy, Stockholm University AlbaNova, Roslagstullbacken 21 SE-10691 Stockholm, Sweden Email: stephan.rosswog at astro.su.se Tel.: +46 (0)8 5537 8529 URL: http://compact-merger.astro.su.se/ From stephan.rosswog at astro.su.se Mon Dec 13 13:55:06 2021 From: stephan.rosswog at astro.su.se (Stephan Rosswog) Date: Mon, 13 Dec 2021 12:55:06 +0000 Subject: [Okc-wp4] Meeting In-Reply-To: References: Message-ID: Please use THIS meeting link Stephan Rosswog is inviting you to a scheduled Zoom meeting. Topic: My Meeting Time: Dec 13, 2021 02:00 PM Stockholm Join Zoom Meeting https://stockholmuniversity.zoom.us/j/61127788962 Meeting ID: 611 2778 8962 Passcode: 613165 One tap mobile +46844682488,,61127788962#,,,,*613165# Sweden +46850163827,,61127788962#,,,,*613165# Sweden Dial by your location +46 8 4468 2488 Sweden +46 8 5016 3827 Sweden +46 8 5050 0828 Sweden +46 8 5050 0829 Sweden +46 8 5052 0017 Sweden +46 850 539 728 Sweden Meeting ID: 611 2778 8962 Passcode: 613165 Find your local number: https://stockholmuniversity.zoom.us/u/cQgSNAuox Join by SIP 61127788962 at 109.105.112.236 61127788962 at 109.105.112.235 Join by H.323 109.105.112.236 109.105.112.235 Meeting ID: 611 2778 8962 Passcode: 613165 Join by Skype for Business https://stockholmuniversity.zoom.us/skype/61127788962 ---------------------------------------------- Prof. Dr. Stephan Rosswog Computational High-Energy Astrophysics The Oskar Klein Centre for Cosmoparticle Physics Department of Astronomy, Stockholm University AlbaNova, Roslagstullbacken 21 SE-10691 Stockholm, Sweden Email: stephan.rosswog at astro.su.se Tel.: +46 (0)8 5537 8529 URL: http://compact-merger.astro.su.se/ -------------- next part -------------- An HTML attachment was scrubbed... URL: From ana.sagues-carracedo at fysik.su.se Wed Dec 15 12:01:01 2021 From: ana.sagues-carracedo at fysik.su.se (=?utf-8?B?QW5hIFNhZ3XDqXMgQ2FycmFjZWRv?=) Date: Wed, 15 Dec 2021 11:01:01 +0000 Subject: [Okc-wp4] Final mission statement Message-ID: <903E8F81-86CD-46F5-A35F-FD01CB2DEE24@fysik.su.se> Hello everyone, I am sending the last version of the mission statement with few modifications. We plan to send the final version on Friday. Please send comments or concerns if you have any before Friday at noon. Kind regards, Ana Sagués Carracedo & Davide Gizzi & Evan O’Connor & Stephan Rosswog -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: Extreme Objects WG Mission Statement Final.pdf Type: application/pdf Size: 429220 bytes Desc: Extreme Objects WG Mission Statement Final.pdf URL: From davide.gizzi at astro.su.se Thu Dec 16 13:16:13 2021 From: davide.gizzi at astro.su.se (Davide Gizzi) Date: Thu, 16 Dec 2021 12:16:13 +0000 Subject: [Okc-wp4] EO meeting: 16th of December In-Reply-To: <53df8fdb15f6448097ab751bcdbd2e1d@astro.su.se> References: <53df8fdb15f6448097ab751bcdbd2e1d@astro.su.se> Message-ID: <5a1f161206a04226a0064e617add12b0@astro.su.se> Hi all, a reminder of the EO meeting starting now! Cheers ________________________________ From: Okc-wp4-at-fysik.su.se on behalf of Davide Gizzi Sent: Monday, December 13, 2021 1:44:40 PM To: Okc-wp4 at fysik.su.se; people at nordita.org Subject: [Okc-wp4] EO meeting: 16th of December Dear all, our last EO meeting before the Christmas break will take place this Thursday, 16th of December, at 13:15 (CET) via Zoom. To join access: https://stockholmuniversity.zoom.us/j/67378581617 The speaker is Bhaskar Biswas, a new postdoc in Stephan Rosswog's group. He will be talking about the research he carried out during his PhD at IUCAA (Pune, India), focused on constraining the neutron star equation of state from astrophysical observations. Below is title and abstract of the talk. Title: Constraining the equation of state of neutron stars using multimessenger observations Abstract: Neutron Stars are the densest objects known in nature. They are observed in multiple electromagnetic bands and recently detected also in the gravitational waves as the binary neutron star merger event GW170817. These observations have led to increase in our understanding of the properties of their interiors, environments and evolution. In this lecture the speaker will talk about the current understanding of the neutron star equation of state combining all the available astrophysical observations. Hope to see you there! Ana Sagués Carracedo & Davide Gizzi -------------- next part -------------- An HTML attachment was scrubbed... URL: From davide.gizzi at astro.su.se Fri Dec 17 13:57:57 2021 From: davide.gizzi at astro.su.se (Davide Gizzi) Date: Fri, 17 Dec 2021 12:57:57 +0000 Subject: [Okc-wp4] EO meeting: 16th of December In-Reply-To: <5a1f161206a04226a0064e617add12b0@astro.su.se> References: <53df8fdb15f6448097ab751bcdbd2e1d@astro.su.se>, <5a1f161206a04226a0064e617add12b0@astro.su.se> Message-ID: <03f83f72759b4c3da06386b7dce39677@astro.su.se> Hi all, for those of you who could not attend the EO meeting yesterday, here is a link to the recording. https://stockholmuniversity.box.com/s/e0f40b0517cwl64quyqta3ecjt02ilub Kind regards ________________________________ From: Davide Gizzi Sent: Thursday, December 16, 2021 1:16:13 PM To: Okc-wp4 at fysik.su.se; people at nordita.org Subject: Re: EO meeting: 16th of December Hi all, a reminder of the EO meeting starting now! Cheers ________________________________ From: Okc-wp4-at-fysik.su.se on behalf of Davide Gizzi Sent: Monday, December 13, 2021 1:44:40 PM To: Okc-wp4 at fysik.su.se; people at nordita.org Subject: [Okc-wp4] EO meeting: 16th of December Dear all, our last EO meeting before the Christmas break will take place this Thursday, 16th of December, at 13:15 (CET) via Zoom. To join access: https://stockholmuniversity.zoom.us/j/67378581617 The speaker is Bhaskar Biswas, a new postdoc in Stephan Rosswog's group. He will be talking about the research he carried out during his PhD at IUCAA (Pune, India), focused on constraining the neutron star equation of state from astrophysical observations. Below is title and abstract of the talk. Title: Constraining the equation of state of neutron stars using multimessenger observations Abstract: Neutron Stars are the densest objects known in nature. They are observed in multiple electromagnetic bands and recently detected also in the gravitational waves as the binary neutron star merger event GW170817. These observations have led to increase in our understanding of the properties of their interiors, environments and evolution. In this lecture the speaker will talk about the current understanding of the neutron star equation of state combining all the available astrophysical observations. Hope to see you there! Ana Sagués Carracedo & Davide Gizzi