The Quenched Satellite Population Around Milky Way Analogs

ABSTRACT We study the relative fractions of quenched and star-forming satellite galaxies in Satellites Around Galactic Analogs (SAGA) survey Exploration Local VolumE (ELVES) program, two nearby complementary samples Milky Way-like that take different approaches to identify faint galaxy populations. cross-check validate sample cuts selection criteria, as well explore effects star-formation definitions when determining fraction Way analogues. find mean ELVES (〈QF〉), derived using a specific star formation rate (sSFR) threshold, decreases from ∼50 per cent ∼27 after applying cut absolute magnitude match SAGA (〈QF〉SAGA ∼9 cent). show these results are consistent for alternative definitions. Furthermore, remain virtually unchanged an additional surface brightness. Using consistently sSFR limit both samples, we cumulative number satellites broadly agree. briefly radial trends finding general agreement host function radius. Despite broad between some tension remains with comparison Group simulations