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<div>Dear all,<br>
<br>
The next SU astronomy departmental seminar will take place on
Friday October 6 at 10:30am in room FC61 (AlbaNova building, 6th
floor) and on zoom
(<a class="moz-txt-link-freetext" href="https://stockholmuniversity.zoom.us/s/61002076352">https://stockholmuniversity.zoom.us/s/61002076352</a>).<br>
<br>
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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>
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<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 TBD<br>
2023-11-10 Alberto Saldana Lopez<br>
2023-11-17 TBD<br>
2023-11-24 Aline Chu<br>
2023-12-01 TBD<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 we are currently experiencing some technical
issues with the calendar and it is currently not displaying some
of the incoming events)<br>
(Please note that calendar can be subject to updates)<br>
<br>
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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>
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