posted on 2020-04-30, 22:53authored byCaroline McCormick, Chun LyChun Ly
This talk was presented on 2020 April 18 at the 2019-20 NASA Arizona Space Grant Symposium. The event was virtually available via Zoom.
To understand how galaxies evolve, measurements that characterize the diffuse gas within galaxies are needed. One
such measurement is the chemical content produced by stars. It is a fossilized record of cumulative star formation
that is impacted by gas inflows and outflows. Driven by these insights, my NASA Space Grant project focused on
constructing a stellar mass--chemical abundance relation for high-redshift galaxies. Contrary to previous work, my
analyses derive chemical abundances using more robust measurements sensitive to the gas temperature. This makes
it one of the first extragalactic studies to do so for the early universe. Specifically, we use the [OIII]4363 emission
line and implement a spectral stacking approach to increase the detection signal for this weak emission line. With
stacks for different stellar mass bins, our preliminary results illustrate that a correlation exists between stellar mass
and chemical abundance for high-redshift galaxies.
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THE ARIZONA SPACE GRANT CONSORTIUM (AZSGC), IS A PHASE I NASA SPACE GRANT COLLEGE AND FELLOWSHIP CONSORTIUM WITH THE THREE STATE UNIVERSITIES: THE UNIVERSITY OF ARIZONA (UA), ARIZONA STATE UNIVERSITY (ASU), NORTHERN ARIZONA UNIVERSITY (NAU), AND EMBRY-RID