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http://hdl.handle.net/20.500.12386/29542
Title: | The Rest-frame H-band Luminosity Function of Red-sequence Galaxies in Clusters at 1.0 < z < 1.3 | Authors: | Chan, Jeffrey C. C. Wilson, Gillian Rudnick, Gregory Muzzin, Adam Balogh, Michael Nantais, Julie van der Burg, Remco F. J. Cerulo, Pierluigi BIVIANO, ANDREA 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. DE LUCIA, GABRIELLA Marchesini, Danilo McGee, Sean L. Stefanon, Mauro Zaritsky, Dennis |
Issue Date: | 2019 | Journal: | THE ASTROPHYSICAL JOURNAL | Number: | 880 | Issue: | 2 | First Page: | 119 | 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<SUP>\prime</SUP> and IRAC 3.6 μm imaging, we identify red-sequence galaxies and measure their LFs down to {M}<SUB>H</SUB>∼ {M}<SUB>H</SUB><SUP>* </SUP>+(2.0-3.0). By stacking the entire sample, we derive a shallow faint-end slope of α ∼ -{0.35}<SUB>-0.15</SUB><SUP>+0.15</SUP> and {M}<SUB>H</SUB><SUP>* </SUP>∼ -{23.52}<SUB>-0.17</SUB><SUP>+0.15</SUP>, 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}<SUB>-0.15</SUB><SUP>+0.19</SUP>) 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. | URI: | http://hdl.handle.net/20.500.12386/29542 | URL: | https://iopscience.iop.org/article/10.3847/1538-4357/ab2b3a | ISSN: | 0004-637X | DOI: | 10.3847/1538-4357/ab2b3a | Bibcode ADS: | 2019ApJ...880..119C | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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Chan_HLF.pdf | pdf editoriale | 2.19 MB | Adobe PDF | View/Open |
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