The Nascent Red Sequence at z~2

Abstract

We present new constraints on the evolution of the early-type galaxy color-magnitude relation (CMR) based on deep near-infrared imaging of a galaxy protocluster at z=2.16 obtained using NICMOS on-board the Hubble Space Telescope. This field contains a spectroscopically confirmed space-overdensity of Lyman-alpha and H-alpha emitting galaxies which surrounds the powerful radio galaxy MRC 1138-262. Using these NICMOS data we identify a significant surface-overdensity (= 6.2x) of red J-H galaxies in the color-magnitude diagram (when compared with deep NICMOS imaging from the HDF-N and UDF). The optical-NIR colors of these prospective red-sequence galaxies indicate the presence of on-going dust-obscured star-formation or recently formed (<~ 1.5 Gyr)stellar populations in a majority of the red galaxies. We measure the slope and intrinsic scatter of the CMR for three different red galaxy samples selected by a wide color cut, and using photometric redshifts both with and without restrictions on rest-frame optical morphology. In all three cases both the rest-frame $U-B$ slope and intrinsic color scatter are considerably higher than corresponding values for lower redshift galaxy clusters. These results suggest that while some relatively quiescent galaxies do exist in this protocluster both the majority of the galaxy population and hence the color-magnitude relation are still in the process of forming, as expected.

8 pages, 7 figures, accepted for publication in ApJ (to appear June 1, 2008, v679n2)

References in corpus (24)

• Stellar population synthesis at the resolution of 2003
• The Origin of the Mass--Metallicity Relation: Insights from 53,000 Star-Forming Galaxies in the SDSS
• Detailed Structural Decomposition of Galaxy Images
• Nearly 5000 Distant Early-Type Galaxies in COMBO-17: a Red Sequence and its Evolution since z~1
• Bayesian photometric redshift estimation
• Galaxy Luminosity Functions to z~1: DEEP2 vs. COMBO-17 and Implications for Red Galaxy Formation
• The Red-Sequence Cluster Survey I: The Survey and Cluster Catalogs for Patches RCS0926+37 and RCS1327+29
• Discovery of an X-ray-Luminous Galaxy Cluster at z=1.4
• Advanced Camera for Surveys Photometry of the Cluster RDCS1252.9-2927: The Color-Magnitude Relation at z=1.24
• NICMOS Imaging of DRGs in the HDF-S: A Relation Between Star-Formation and Size at z ~ 2.5
• Spectroscopic Identification of a Proto-Cluster at z=2.300: Environmental Dependence of Galaxy Properties at High Redshift
• The First Appearance of the Red Sequence of Galaxies in Proto-Clusters at 2<~z<~3
• The XMM Cluster Survey: A Massive Galaxy Cluster at z=1.45
• The Spiderweb galaxy: a forming massive cluster galaxy at z~2
• The Star Formation Epoch of the Most Massive Early-Type Galaxies
• Clusters at Half Hubble Time: Galaxy Structure and Colors in RXJ0152.7-1357 and MS1054-03
• An IR-Selected Galaxy Cluster at z = 1.41
• A search for clusters at high redshift - III. Candidate H-alpha emitters and EROs in the PKS 1138-262 proto-cluster at z=2.16
• The NICMOS Ultra Deep Field: Observations, Data Reduction, and Galaxy Photometry
• The Unusual Infrared Object HDF-N J123656.3+621322
• A comparison among LBGs, DRGs and BzK galaxies: their contribution to the stellar mass density in the GOODS-MUSIC sample
• A search for clusters at high redshift - IV. Spectroscopy of H-alpha emitters in a proto-cluster at z=2.16
• A Chandra study of X-ray sources in the field of the z=2.16 radio galaxy MRC 1138-262
• The Filamentary Large Scale Structure around the z = 2.16 Radio Galaxy PKS 1138-262

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• COSMOS2020: Discovery of a protocluster of massive quiescent galaxies at $z=2.77$
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• ALMACAL. XI. Over-densities as signposts to proto-clusters? A cautionary tale
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