[Astronomy seminar] Reminder: Astronomy departmental seminar Friday October 6 at 10:30am - Matilde Mingozzi (Space Telescope Science Institute)

[Astronomy seminar announcements]

Dear all,

This is a reminder of the weekly SU astronomy departmental seminar that 
will take place in about 59 minutes, *at 10:30am in room FC61* (AlbaNova 
building, 6th floor) *and on zoom* 
(https://stockholmuniversity.zoom.us/s/61002076352). As usual, we 
encourage you to attend in person if possible.

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Speaker: Matilde Mingozzi (Space Telescope Science Institute)
Title: The study of Interstellar Medium diagnostics in local galaxies to 
Interpret the Reionization-Era
Event: https://indico.fysik.su.se/e/matilde-mingozzi

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

Adur and Adélaïde

Upcoming Events:

2023-10-13    Guillaume Guiglion
2023-10-20    Adam Rains
2023-10-27    Maryam Saberi
2023-11-03    TBA
2023-11-10    Alberto Saldana Lopez
2023-11-17    TBA
2023-11-24    Aline Chu
2023-12-01    Heitor Ernandes
2023-12-08    Quentin Perceval Xavier Pognan

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)

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Join Zoom Meeting:
https://stockholmuniversity.zoom.us/s/61002076352
Meeting ID: 610 0207 6352

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