A Chemodynamical Census of the Milky Way's Ultra-Faint Compact Satellites. I. A First Population-Level Look at the Internal Kinematics and Metallicities of 19 Extremely-Low-Mass Halo Stellar Systems

William Cerny, Ting S. Li, Andrew B. Pace +13

Deep, wide-area photometric surveys have uncovered a population of compact ($r_{1/2}\approx$ 1-15 pc), extremely-low-mass ($M_{\ast }\approx$ 20-4000 $M_{\odot }$) stellar systems in th…