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<br>
Dear all,<br>
<br>
This is a reminder of the weekly SU astronomy departmental seminar
that will take place in about 59 minutes,
<b>at 10:30am in room FC61</b> (AlbaNova building, 6th floor) <b>and
on zoom</b> (<a
href="https://stockholmuniversity.zoom.us/s/61002076352"
target="_blank" rel="noopener noreferrer" id="LPlnk88844"
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: Matilde Mingozzi (<span style="color:black" lang="IT">Space
Telescope Science Institute</span>)<br>
Title: The study of Interstellar Medium diagnostics in local
galaxies to Interpret the Reionization-Era<br>
Event: <a class="moz-txt-link-freetext"
href="https://indico.fysik.su.se/e/matilde-mingozzi">
https://indico.fysik.su.se/e/matilde-mingozzi</a><br>
<br>
Abstract:<br>
Rest-frame UV spectra play a key role in the understanding of
massive stellar populations, chemical evolution, feedback processes,
and reionization. Indeed, in the current JWST era, the UV
spectroscopic frontier has been pushed to higher redshifts than ever
before, to finally reveal the first galaxies in the distant
Universe. In this context, the HST COS Legacy Archive Spectroscopic
SurveY (CLASSY) provides the first high-quality, high-resolution and
broad-wavelength range catalogue of 45 local star-forming galaxies
(SFGs) in the rest-frame UV (1150 −2000 Å) to investigate their
stellar and gas properties. The sample is representative of SFGs
across all redshifts, including extremely metal-poor objects similar
to reionization-era systems. Hence, CLASSY provides the ideal UV
atlas with which we can tailor a complete UV diagnostic toolkit to
explore the interstellar medium (ISM) properties (i.e., density,
temperature, gas-phase metallicity, ionization parameter). In this
talk I will present such a toolkit, obtained from the analysis of
the main emission lines of CLASSY spectra and the comparison with
well-known optical diagnostics. We also compared our measurements
with state-of-the-art photoionization models, to provide the best
diagnostics plots to identify the main source of ionization.
Overall, CLASSY and our UV toolkit can be crucial to interpret the
earliest galaxies revealed with JWST.<br>
———————————<br>
<br>
We look forward to seeing many of you there. Thanks!<br>
<br>
Adur and Adélaïde<br>
<br>
Upcoming Events:<br>
<br>
2023-10-13 Guillaume Guiglion<br>
2023-10-20 Adam Rains<br>
2023-10-27 Maryam Saberi<br>
2023-11-03 TBA<br>
2023-11-10 Alberto Saldana Lopez<br>
2023-11-17 TBA<br>
2023-11-24 Aline Chu<br>
2023-12-01 Heitor Ernandes<br>
2023-12-08 Quentin Perceval Xavier Pognan<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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