[Physics-grads-open] Physics and Astronomy Student Seminar (PASS)

[Pooyan Goodarzi]

Hi all,

We will have our next PASS talks this Monday with a talk by Michael about
star formation and interstellar dust. Please join us on *October 28th
(Monday)* at *noon* (from 12:00 pm to 1:00 pm) in the *Nebula Room* (PHYS
3027).


*Michael Wozniak, PhD student*

Monday, 12:00 pm, Nebula Room (PHYS 3027)
*Constraining Dust Attenuation and Star-Formation Rates of z~2 Star-Forming
Galaxies with Paschen and Balmer Line Measurements from JWST and Keck*

Interstellar dust is a product of star formation that is ubiquitous across
star-forming galaxies during cosmic noon, and absorbs and scatters light
within the galaxies. Correcting for dust is necessary when inferring
several galaxy properties, including star-formation rate and the age of
stellar populations. Hydrogen recombination lines are the most common tool
for determining reddening and star-formation rates in nebular regions
within galaxies. The advent of JWST has enabled new observations of Paschen
emission from galaxies at z~2, which is less affected by dust than Balmer
emission. For our analysis, we obtain measurements of Balmer and Paschen
emission for a sample of 83 galaxies using ground- and space-based
observations from MOSFIRE and NIRCam/grism. We compare the nebular
reddenings as probed by the Balmer and Paschen emission and find that, once
observational effects are accounted for, using Paschen emission can reveal
star formation in regions that are optically thick to the Balmer emission
alone.


If you’re interested in sharing your work as a speaker, please feel free to
add your name to the spreadsheet [Google Sheet
<https://docs.google.com/spreadsheets/d/1N3ncf43jdB6aHYHhyWmyHMycxDg4_phHZXLkQvviO0o/edit?usp=sharing>
].

Best,
Pooyan
Physics and Astronomy Student Seminar (PASS)
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