The Ratio of Luminous to Faint Red Sequence Galaxies in X-Ray and Optically Selected Low-Redshift Clusters

Abstract

We study the ratio of luminous-to-faint red sequence galaxies in both optically and X-ray selected galaxy clusters in the poorly studied redshift range 0.05< z<0.19. The X-ray selected sample consists of 112 clusters based on the ROSAT All-Sky Survey, while the optical sample consists of 266 clusters from the Sloan Digital Sky Survey. Our results are consistent with the presence of a trend in luminous-to-faint ratio with redshift, confirming that downsizing is continuous from high to low redshift. After correcting for the variations with redshift using a partial Spearman analysis, we find no significant relationship between luminous-to-faint ratio and X-ray luminosity of the host cluster sample, in contrast to recent suggestions. Finally, we investigate the stacked colour-magnitude relations of these samples finding no significant differences between the slopes for optically and X-ray selected clusters. The colour-magnitude slopes are consistent with the values obtained in similar studies, but not with predictions of theoretical models.

11 pages, 6 figures, 3 tables. Accepted for publication by MNRAS

References in corpus (30)

• K-corrections and filter transformations in the ultraviolet, optical, and near infrared
• Galaxy Groups in the SDSS DR4: I. The Catalogue and Basic Properties
• Minor mergers and the size evolution of elliptical galaxies
• The size evolution of galaxies since z~3: combining SDSS, GEMS and FIRES
• The Morphology - Density Relation in z ~ 1 Clusters
• HST and Spitzer imaging of red and blue galaxies at z~2.5: A correlation between size and star formation activity from compact quiescent galaxies to extended star forming galaxies
• The Galaxy Content of SDSS Clusters and Groups
• MaxBCG: A Red Sequence Galaxy Cluster Finder
• Discriminating Between the Physical Processes that Drive Spheroid Size Evolution
• The build-up of the colour-magnitude relation in galaxy clusters since z~0.8
• The Build-up of the Colour-Magnitude Relation as a Function of Environment
• A high stellar velocity dispersion for a compact massive galaxy at z=2.2
• Evolution of the Color-Magnitude Relation in Galaxy Clusters at z ~1 from the ACS Intermediate Redshift Cluster Survey
• The build-up of the red-sequence in galaxy clusters since z~0.8
• The RASS-SDSS Galaxy Cluster Survey. III. Scaling relations of galaxy clusters
• An Increase in the faint red galaxy population in massive clusters since z~0.5
• The Evolution of the Field and Cluster Morphology-Density Relation for Mass-Selected Samples of Galaxies
• The XMM Cluster Survey: Galaxy Morphologies and the Color-Magnitude Relation in XMMXCS J2215.9-1738 at z=1.46
• Mass-Selection and the Evolution of the Morphology-Density Relation from z=0.8 to z=0
• The history of mass assembly of faint red galaxies in 28 galaxy clusters since z=1.3
• The Red-Sequence Luminosity Function in Galaxy Clusters since z~1
• The Luminosity Function of Low-Redshift Abell Galaxy Clusters
• The XMM Cluster Survey: Forecasting cosmological and cluster scaling-relation parameter constraints
• The environmental dependence of galaxy colors in intermediate redshift X-ray-selected clusters
• Tracking Down a Critical Halo Mass for Killing Galaxies through the Growth of the Red-Sequence
• The discovery of a massive supercluster at z=0.9 in the UKIDSS DXS
• How Massive are Massive Compact Galaxies?
• Dependence of the Build-up of the Colour-Magnitude Relation on Cluster Richness at z ~ 0.8
• The Galaxy Population of Low-Redshift Abell Clusters
• The Properties of the Heterogeneous Shakhbazyan Groups of Galaxies in the SDSS

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• The Evolution of K* and the Halo Occupation Distribution since z=1.5: Observations vs. Simulations
• The faint end of the galaxy luminosity function in Abell 1689: a steep red faint end upturn at $z=0.18$
• The Rest-frame $H$-band Luminosity Function of Red Sequence Galaxies in Clusters at $1.0<z<1.3$
• Segregation effects in DEEP2 galaxy groups
• The Morphological Transformation of Red-Sequence Galaxies in the Distant Cluster XMMU J1229+0151
• Galaxies in X-ray Selected Clusters and Groups in Dark Energy Survey Data II: Hierarchical Bayesian Modeling of the Red-Sequence Galaxy Luminosity Function