The Rest-frame H-band Luminosity Function of Red-sequence Galaxies in Clusters at 1.0 < z < 1.3

Journal
Date Issued
2019
Author(s)
Chan, Jeffrey C. C.
•
Wilson, Gillian
•
Rudnick, Gregory
•
Muzzin, Adam
•
Balogh, Michael
•
Nantais, Julie
•
van der Burg, Remco F. J.
•
Cerulo, Pierluigi
•
•
Cooper, Michael C.
•
Demarco, Ricardo
•
Forrest, Ben
•
Lidman, Chris
•
Noble, Allison
•
Old, Lyndsay
•
Pintos-Castro, Irene
•
Reeves, Andrew M. M.
•
Webb, Kristi A.
•
Yee, Howard K. C.
•
Abdullah, Mohamed H.
•
•
Marchesini, Danilo
•
McGee, Sean L.
•
Stefanon, Mauro
•
Zaritsky, Dennis
DOI
Abstract
We present results on the rest-frame H-band luminosity functions (LFs) of red-sequence galaxies in seven clusters at 1.0 < z < 1.3 from the Gemini Observations of Galaxies in Rich Early Environments Survey. Using deep GMOS z\prime and IRAC 3.6 μm imaging, we identify red-sequence galaxies and measure their LFs down to {M}H∼ {M}H* +(2.0-3.0). By stacking the entire sample, we derive a shallow faint-end slope of α ∼ -{0.35}-0.15+0.15 and {M}H* ∼ -{23.52}-0.17+0.15, suggesting that there is a deficit of faint red-sequence galaxies in clusters at high redshift. By comparing the stacked red-sequence LF of our sample with a sample of clusters at z ∼ 0.6, we find an evolution of the faint end of the red sequence over the ∼2.6 Gyr between the two samples, with the mean faint-end red-sequence luminosity growing by more than a factor of 2. The faint-to-luminous ratio of our sample ({0.78}-0.15+0.19) is consistent with the trend of decreasing ratio with increasing redshift proposed in previous studies. A comparison with the field shows that the faint-to-luminous ratios in clusters are consistent with those in the field at z ∼ 1.15 and exhibit a stronger redshift dependence. Our results support the picture that the buildup of faint red-sequence galaxies occurs gradually over time and suggest that faint cluster galaxies, similar to bright cluster galaxies, already experience the quenching effect induced by the environment at z ∼ 1.15.
Volume
880
Issue
2
Start page
119
Uri
Url
Issn Identifier
0004-637X
Ads BibCode
2019ApJ...880..119C
Rights
open.access
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