The Environmental Dependence of Properties of Galaxies around the RDCSJ0910+54 Cluster at z=1.1

Abstract

(Abridged) We report on the environmental dependence of properties of galaxies around the RDCSJ0910+54 cluster at z=1.1. We have obtained multi-band wide-field images of the cluster with Suprime-Cam and MOIRCS on Subaru and WFCAM on UKIRT. Also, an intensive spectroscopic campaign has been carried out using LRIS on Keck and FOCAS on Subaru. We discover a possible large-scale structure around the cluster in the form of three clumps of galaxies. This is potentially one of the largest structures found so far in the z>1 Universe. We then examine stellar populations of galaxies in the structure. Red galaxies have already become the dominant population in the cores of rich clusters at z~1, and the fraction of red galaxies has not strongly changed since then. The red fraction depends on richness of clusters in the sense that it is higher in rich clusters than in poor groups. The luminosity function of red galaxies in rich clusters is consistent with that in local clusters. On the other hand, luminosity function of red galaxies in poor groups shows a deficit of faint red galaxies. This confirms our earlier findings that galaxies follow an environment-dependent down-sizing evolution. There seems to be a large variation in the evolutionary phases of galaxies in groups with similar masses. Further studies of high-z clusters will be a promising way of addressing the role of nature and nurture effects on galaxy evolution.

11 pages, 10 figures, accepted for publication in A&A

References in corpus (12)

• The XMM-Newton wide-field survey in the COSMOS field: VI. Statistical properties of clusters of galaxies
• The build-up of the colour-magnitude relation in galaxy clusters since z~0.8
• The DEEP2 Galaxy Redshift Survey: Evolution of the Color-Density Relation at 0.4 < z < 1.35
• The XMM Cluster Survey: A Massive Galaxy Cluster at z=1.45
• The VIMOS VLT Deep Survey: The build-up of the colour-density relation
• The DEEP2 galaxy redshift survey: the evolution of the blue fraction in groups and the field
• Evolution of the Color-Magnitude relation in High-Redshift Clusters: Early-type Galaxies in the Lynx Supercluster at z~1.26
• The Red-Sequence Luminosity Function in Galaxy Clusters since z~1
• Galaxy evolution in the high redshift, colour-selected cluster RzCS 052 at z=1.02
• A Deficit of Faint Red Galaxies in the Possible Large-Scale Structures around the RDCS J1252.9-2927 Cluster at z=1.24
• Dependence of the Build-up of the Colour-Magnitude Relation on Cluster Richness at z ~ 0.8
• A Huge Filamentary Structure at z=0.55 and Star Formation Histories of Galaxies at z<1

Cited by in corpus (11)

• Glimpsing the Imprint of Local Environment on the Galaxy Stellar Mass Function
• Mining the gap: evolution of the magnitude gap in X-ray galaxy groups from the 3 square degree XMM coverage of CFHTLS
• Spitzer UltRa Faint SUrvey Program (SURFS UP) I: An Overview
• Conditional Quenching: A detailed look at the SFR-Density Relation at z ~ 0.9 from ORELSE
• The Chandra Deep Group Survey -- cool core evolution in groups and clusters of galaxies
• Velocity segregation effects in galaxy clusters at 0.4<~z<~1.5
• Brightest X-ray clusters of galaxies in the CFHTLS wide fields: Catalog and optical mass estimator
• X-Ray Emitting Active Galactic Nuclei from z = 0.6-1.3 in the Intermediate and High-Density Environments of the ORELSE Survey
• Suppressed Star Formation by a Merging Cluster System
• Extended radio AGN at z ~ 1 in the ORELSE survey: The confining effect of dense environments
• Connection Between Galaxies and HI in the Circumgalactic and Intergalactic Media: Variation According to Galaxy Stellar Mass and Star-formation Activity