Submitted to ApJ Preprint typeset using LATEX style emulateapj v. 04/17/13 (TT) OBSERVATIONS OF ENVIRONMENTAL QUENCHING IN GROUPS IN THE 11 GYR SINCE z = 2.5: DIFFERENT QUENCHING FOR CENTRAL AND SATELLITE GALAXIES

We present direct observational evidence for star formation quenching in galaxy groups in the redshift range 0 < z < 2.5. We utilize a large sample of nearly 6000 groups, selected by fixed cumulative number density from three photometric catalogs, to follow the evolving quiescent fractions of central and satellite galaxies over roughly 11 Gyr. At z ∼ 0, central galaxies in our sample range in stellar mass from Milky Way/M31 analogs (M?/M = 6.5 × 1010) to nearby massive ellipticals (M?/M = 1.5 × 1011). Satellite galaxies in the same groups reach masses as low as twice that of the Large Magellanic Cloud (M?/M = 6.5 × 109). Using statistical background subtraction, we measure the average rest-frame colors of galaxies in our groups and calculate the evolving quiescent fractions of centrals and satellites over seven redshift bins. Our analysis shows clear evidence for star formatio