The Low-Mass Galaxy Frontier

May 11, 2023 - 11:00 am to 12:00 pm

Campus, PAB 102/103

Dan Weisz (UC Berkeley) In Person and zoom

Zoom Recording

Low-mass low-metallicity (LMLZ) galaxies are central to a wide variety of astrophysics including the nature of dark matter, cosmic reionization, and understanding the origins of exotic transients. Our knowledge of LMLZ galaxies is primarily achnored in resolved star observations of Milky Way (MW) satellite galaxies. Here, I will describe several efforts to systematically expand the frontier of LMLZ galaxies beyond the MW halo. I will highlight new results from my ongoing HST Treasury survey of M31 satellite galaxies, including new results on the controversial plane of satellites around M31 and the diversity of star formation histories among M31’s faintest satellites. I will describe the JWST Early Release Science Program for Resolved Stellar Populations, which is laying the foundation for JWST studies of galaxies throughout the Local Volume. Finally, I will introduce the Ultraviolet Explorer (UVEX). UVEX is a NASA MIDEX mission undergoing Phase A concept study. It will enable a wide variety of science including uncovering and and characterizing millions of LMLZ galaxies within ~100 Mpc using UV imaging and spectroscopy.