[Astronomy seminar] Astronomy departmental seminar Friday November 17 at 10:30am - Alberto Saldana Lopez (Stockholm University)

[Astronomy seminar announcements]

Dear all,


The next SU astronomy departmental seminar will take place on Friday November 17 at 10:30am in room FC61 (AlbaNova building, 6th floor) and on zoom (https://stockholmuniversity.zoom.us/s/61002076352).

___________________


Speaker: Alberto Saldana Lopez (Stockholm University)

Title: A low-redshift look to reionization with star-forming galaxies

Event: https://indico.fysik.su.se/e/alberto-saldana-lopez


Abstract:

One of the current hot topics in galaxy evolution is the so-called Cosmic Reionization, the last major cosmic phase by which the Universe transitioned from a neutral to a (mostly) ionized state, happening around z = 6-9. The main responsible sources for reionization are still under debate, but star-forming galaxies seem to be the likeliest due to their high number density at early epochs respect to Active Galactic Nuclei.


However, directly probing ionizing (also called Lyman Continuum, LyC) radiation from galaxies at the Epoch of Reionization is difficult, since the escaping photons are likely absorbed by the remaining neutral gas in the intergalactic medium (IGM). Therefore, in order to study the role of star-forming galaxies during Reionization, we need to rely on indirect indicators of such emergent LyC radiation. The low-redshift Universe offers a unique window to study the properties of LyC-emitting galaxies, since the IGM attenuation is negligible and, at the same time, a full suite of multi-wavelength observations is available both from space and the ground.


Recent HST campaigns such as the Low-Redshift Lyman Continuum Survey (LzLCS) has nearly tripled the number of LyC detections at low-redshift. The LzLCS has revealed that compact star formation, high ionization parameters, strong and narrow LyA emission, low dust-attenuation and the presence of weak absorption lines seem to characterize the spectra of the strongest LyC emitters. In this talk, I will present some of the main results of the LzLCS and explain how this data set has changed our understanding of the mechanisms for LyC escape. We will also discuss the implications of these results for the high redshift community in the JWST era.

___________________


We look forward to seeing many of you there. Thanks!


Adur and Adélaïde


Upcoming Events:


2023-11-24 Aline Chu

2023-12-01 Heitor Ernandes

2023-12-08 Quentin Perceval Xavier Pognan

--- Winter break ---


You can subscribe to the seminars calendar in: https://ttt.astro.su.se/ical/astro-seminars.ics

(Please note that calendar can be subject to updates)

___________________


Join Zoom Meeting:

https://stockholmuniversity.zoom.us/s/61002076352

Meeting ID: 610 0207 6352
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.su.se/pipermail/seminars-announce.astro-at-su.se/attachments/20231113/e1a8847b/attachment.html>