Circumgalactic Medium at High Halo Masses -- Signatures of Cold Gas Depletion in Luminous Red Galaxies

Marijana Smailagic, Jason Xavier Prochaska, Joseph Burchett +1

We study ultraviolet HI and metal line transitions in the circumgalactic medium (CGM) of 15 massive, quenched luminous red galaxies (LRGs) at redshift $z\sim 0.5$ and with impact p…