[Physics-grads-open] PASS talk on Wednesday

[Pooyan Goodarzi]

Hi all,


We will have a PASS talk by Michael next *Wednesday, *October 15, at 
noon.**Please note that this is different from our usual weekly time. 
Michael's talk about feedback and dust in galaxies will be a dry run of 
his advance to candidacy exam later next week. Please join us at noon 
(*from 12:00 to 1:00 pm*) in the *Nebula Room* (PHYS 3027) to hear about 
his research, give him feedback on slides, and wish him the best for his 
exam.


*Michael Wozniak, PhD Student*
  Wednesday, 12:00 pm, Nebula Room (PHYS 3027)

*Impact of Galactic Feedback and Dust Geometry on Metallicity and 
Star-Formation Rates in z~2 Star-Forming Galaxies*

*
*

Dust production and baryon cycling are critical components of galaxy 
evolution. Galaxies accrete cold gas, convert the gas into stars, and 
eject both dust and metal-rich gas into the interstellar medium. Within 
this cycle, galactic outflows regulate star formation and redistribute 
metals, while dust obscuration shapes how we measure star-formation 
rates (SFRs).

In the first part of the talk, I will discuss the role of galactic 
outflows in regulating metallicity. Using rest-frame optical and UV 
spectroscopy, we investigate how outflow velocities correlate with 
deviations from the fundamental metallicity relation (FMR), and find 
tentative evidence that faster outflows are associated with larger 
deviations below FMR-based metallicities.

In the second part, I will compare nebular reddening and SFRs derived 
from Balmer and Paschen lines. On average, Paschen-based measurements 
agree with Balmer values, but in galaxies with patchy dust geometries, 
the Paschen lines reveal star formation in the most heavily 
dust-obscured regions that Balmer lines alone fail to measure.



If you’re interested in sharing your work as a speaker, please feel free 
to add your name to this spreadsheet [Google Sheet 
<https://docs.google.com/spreadsheets/d/1N3ncf43jdB6aHYHhyWmyHMycxDg4_phHZXLkQvviO0o/edit?usp=sharing>]. 
Recordings of all the previous talks are available on our website: 
https://ucrpass.arxiv.social


Best,
Pooyan
Physics and Astronomy Student Seminar (PASS)
https://ucrpass.arxiv.social


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