[Okc-wp4] EO meeting Thu Nov 19 @ 13:15 via Zoom

[Andre Schneider]

Reminder of the EO meeting this Thursday.




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André da Silva Schneider

Department of Astronomy

Stockholm University



________________________________
From: Okc-wp4-at-fysik.su.se <okc-wp4-at-fysik.su.se-bounces at lists.su.se> on behalf of Andre Schneider <andre.schneider at astro.su.se>
Sent: Monday, November 16, 2020 11:50:39 PM
To: Okc-wp4 at fysik.su.se; people at nordita.org
Subject: [Okc-wp4] EO meeting Thu Nov 19 @ 13:15 via Zoom



Dear colleagues,

our next EO meeting will take place this Thursday Nov 19 at 13:15 via Zoom.
The meeting will be online. To join access <https://stockholmuniversity.zoom.us/j/61497979368> https://stockholmuniversity.zoom.us/j/65928545270
You will be able to enter the meeting room from 13:00. See below for other methods to participate.



This week Erik Kool from Stockholm University will present


Title: TDE or not TDE, that is the question: The puzzle of the energetic nuclear transient AT 2017gbl

Abstract:
Current transient research is heavily biased towards optical discovery, with widefield surveys such as ZTF, Pan-STARRS and ATLAS scouring the sky for transients on a nightly basis. As a consequence, transient events that are affected by (heavy) dust exctinction are often missed, or not classified. For example, tidal disruption events (TDE) are disproportionally discovered in post-starburst galaxies with little to no dust content, suggesting a preference for such an environment. However, recent discoveries of TDE candidates by small scale infrared (IR) searches targeting luminous infrared galaxies (LIRGs), starbursting galaxies that are host to copious amounts of dust, suggest LIRGs may in fact have inflated rates of TDEs, hidden from view in the optical due to significant dust extinction. In this talk I present a case study of the extremely IR-energetic nuclear transient AT 2017gbl, discovered as part of a targeted IR monitoring program of LIRGs. AT 2017gbl was barely detected in the optical, which prohibited traditional classification through optical spectra. Instead, a large follow up effort ranging from the X-ray through adaptive-optics assisted IR photometry to very large baseline radio interferometry was conducted to determine the properties and nature of this transient. The analysis of this extensive data set provided lots of puzzle pieces, and I will discuss whether they fit together to show a luminous supernova, a TDE, or perhaps increased accretion by an active galactic nucleus.




See you then!




Andre da Silva Schneider is inviting you to a scheduled Zoom meeting.

Topic: EO Meeting
Time: Nov 5, 2020 01:00 PM Stockholm
        Every 2 weeks on Thu, 4 occurrence(s)
        Nov 5, 2020 01:00 PM
        Nov 19, 2020 01:00 PM
        Dec 3, 2020 01:00 PM
        Dec 17, 2020 01:00 PM
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Meeting ID: 659 2854 5270
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