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

Jeffrey C.C. Chan, Gillian Wilson, Gregory Rudnick, Adam Muzzin, Michael Balogh, Julie Nantais, Remco F.J.Van Der Burg, Pierluigi Cerulo, Andrea Biviano, Michael C. Cooper, Ricardo Demarco, Ben Forrest, Chris Lidman, Allison Noble, Lyndsay Old, Irene Pintos-Castro, Andrew M.M. Reeves, Kristi A. Webb, Howard K.C. Yee, Mohamed H. AbdullahGabriella De Lucia, Danilo Marchesini, Sean L. McGee, Mauro Stefanon, Dennis Zaritsky

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10 Citas (Scopus)

Resumen

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 and IRAC 3.6 μm imaging, we identify red-sequence galaxies and measure their LFs down to MH ∼ MH + (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 MH ∼ -23.520.17 +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.

Idioma originalInglés
Número de artículo119
PublicaciónAstrophysical Journal
Volumen880
N.º2
DOI
EstadoPublicada - 1 ago. 2019

Áreas temáticas de ASJC Scopus

  • Astronomía y astrofísica
  • Ciencias planetarias y espacial

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