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Dear all,<br>
<br>
This is a reminder of the weekly SU astronomy departmental seminar
that will take place in about 23 minutes, at 10:30am in room FC61
(AlbaNova building, 6th floor) and on zoom (<a
href="https://stockholmuniversity.zoom.us/s/61002076352"
id="LPlnk814175" class="moz-txt-link-freetext">https://stockholmuniversity.zoom.us/s/61002076352</a>).
As usual, we encourage you to attend in person if possible.<br>
___________________<br>
<br>
Speaker: Alberto Saldana Lopez (Stockholm University)<br>
Title: A low-redshift look to reionization with star-forming
galaxies<br>
Event: <a class="moz-txt-link-freetext" href="https://indico.fysik.su.se/e/alberto-saldana-lopez">https://indico.fysik.su.se/e/alberto-saldana-lopez</a><br>
<br>
Abstract:<br>
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.<br>
<br>
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.<br>
<br>
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.<br>
___________________<br>
<br>
We look forward to seeing many of you there. Thanks!<br>
<br>
Adur and Adélaïde<br>
<br>
Upcoming Events:<br>
<br>
2023-11-24 Aline Chu<br>
2023-12-01 Heitor Ernandes<br>
2023-12-08 Quentin Perceval Xavier Pognan<br>
--- Winter break ---<br>
<br>
You can subscribe to the seminars calendar in:
<a class="moz-txt-link-freetext" href="https://ttt.astro.su.se/ical/astro-seminars.ics">https://ttt.astro.su.se/ical/astro-seminars.ics</a><br>
(Please note that calendar can be subject to updates)<br>
___________________<br>
<br>
Join Zoom Meeting:<br>
<a class="moz-txt-link-freetext" href="https://stockholmuniversity.zoom.us/s/61002076352">https://stockholmuniversity.zoom.us/s/61002076352</a><br>
Meeting ID: 610 0207 6352<br>
<br>
<br>
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