Events at Towson University

TU Alumna '19, Kelsey Glazer, PhD Candidate, University of California at Davis

Physics Seminar: Exploring Cosmic Reionization

Speaker: PAGS Alumna '19, Kelsey Glazer, PhD Candidate, University of California at Davis

Abstract: Young star-forming galaxies are believed to be the main contributors to the process of cosmic reionization which completed roughly 1 billion years after the big bang, at a redshift z~6. However, it is unclear whether such galaxies actually had sufficient ionizing escape fractions, as direct measurements are impossible due to the neutral intergalactic medium at this epoch. Indirect measurements of the HI gas covering fraction via low-ionization interstellar (LIS) absorption lines offers a promising means to constrain the escape fraction. While reionization-era galaxies are typically too faint for absorption line measurements, I use stacking analysis of JWST/NIRSpec data to determine the LIS absorption properties of galaxies at z>6, representing the first such measurements in the epoch of reionization. I will also discuss complementary measurements of the interstellar gas content of faint z~7 galaxies from ALMA observations.  

 

Friday, May 10, 2024 at 11:00am to 12:00pm

Science Complex, Room 1230
7801 York Rd Towson MD 21252

Event Type

Academics, Academic Seminar

Departments

Academic Affairs, Physics Astronomy and Geosciences (Department of), Fisher College of Science and Mathematics

Target Audience

Students, Faculty

Website

http://www.towson.edu/physics

Food Served? (Yes/No)

No

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