GBT26A-388

Do Quenched Satellite Galaxies Retain Gas? Measuring HI in SAGA Satellites

Abstract

We propose to constrain the neutral hydrogen (HI) content of 21 quenched satellite galaxies from the SAGA Survey to test whether the absence of star formation in these galaxies is accompanied by a depletion of cold gas. Recent simulations predict that quenched satellites can retain significant gas reservoirs, challenging the prevailing view that quenching requires complete gas stripping. We request 39 GBT hours to reach sensitivities capable of detecting HI gas fractions of ~20%. This will be the first systematic constraint on HI in quenched satellites of Milky Way analogs, and enable robust comparisons with both simulations and the Milky Way's own satellite population, directly informing models of satellite quenching in group environments.

Investigators

Name	Institution
Yasmeen Asali *	Yale University
Marla Geha	Yale University
Pratik Gandhi	Yale University
Grace Gogliettino	Colgate University
Joseph Breneman	Rutgers, The State University of New Jersey

* indicates the PI