ITC Colloquium - Kim-Vy Tran (University of New South Wales)
Date and Time
February 27, 2020
11:00AM - 12:00PM EST
Location
Pratt
ZFOURGE & MOSEL : Tracking Galaxy Growth at Cosmic Noon
Abstract -- ZFOURGE and MOSEL are deep observational surveys that track how galaxies assemble over cosmic time. ZFOURGE identifies approximately 70,000 objects up to redshifts of z~7 using a custom set of near-infrared imaging filters that provide high precision photometric redshifts. MOSEL targets galaxies at 2<z<4 from ZFOURGE for spectroscopic follow-up to measure properties including star formation histories and kinematics. Here I highlight results that include using the SED fitting code Prospector to determine star formation histories for a range of galaxy populations and comparing galaxy kinematics to IllustrisTNG. We find that massive galaxies at z~3.5 tend to build their stellar mass by accreting stars from other galaxies, e.g. merging, rather than converting bound gas into stars.
Abstract -- ZFOURGE and MOSEL are deep observational surveys that track how galaxies assemble over cosmic time. ZFOURGE identifies approximately 70,000 objects up to redshifts of z~7 using a custom set of near-infrared imaging filters that provide high precision photometric redshifts. MOSEL targets galaxies at 2<z<4 from ZFOURGE for spectroscopic follow-up to measure properties including star formation histories and kinematics. Here I highlight results that include using the SED fitting code Prospector to determine star formation histories for a range of galaxy populations and comparing galaxy kinematics to IllustrisTNG. We find that massive galaxies at z~3.5 tend to build their stellar mass by accreting stars from other galaxies, e.g. merging, rather than converting bound gas into stars.