Environmental effects on the bright end of the galaxy luminosity function in galaxy clusters

Abstract

The dependence of the luminosity function of cluster galaxies on the evolutionary state of the parent cluster is still an open issue, in particular as concern the formation/evolution of the brightest cluster galaxies. We plan to study the bright part of the LFs of a sample of very unrelaxed clusters ("DARC" clusters showing evidence of major, recent mergers) and compare them to a reference sample of relaxed clusters spanning a comparable mass and redshift range. Our analysis is based on the SDSS DR7 photometric data of ten, massive, and X-ray luminous clusters (0.2<z<0.3), always considering physical radii (R_200 or its fractions). We consider r' band LFs and use the color-magnitude diagrams (r'-i',r') to clean our samples as well to consider separately red and blue galaxies. We find that DARC and relaxed clusters give similar LF parameters and blue fractions. The two samples differ for their content of bright galaxies BGs, M_r<-22.5, since relaxed clusters have fewer BGs, in particular when considering the outer cluster region 0.5R_200<R<R_200 (by a factor two). However, the cumulative light in BGs is similar for relaxed and DARC samples. We conclude that BGs grow in luminosity and decrease in number as the parent clusters grow hierarchically in agreement with the BG formation by merging with other luminous galaxies.

11 pages, 12 figures and 9 tables

References in corpus (24)

• The hierarchical formation of the brightest cluster galaxies
• On the connection between giant radio halos and cluster mergers
• Images, structural properties and metal abundances of galaxy clusters observed with Chandra ACIS-I at 0.1<z<1.3
• On the efficiency and reliability of cluster mass estimates based on member galaxies
• A statistically-selected Chandra sample of 20 galaxy clusters -- I. Temperature and cooling time profiles
• Simulating the Bullet Cluster
• The XMM Cluster Survey: The build up of stellar mass in Brightest Cluster Galaxies at high redshift
• The Rest-Frame Optical Luminosity Function of Cluster Galaxies at z<0.8 and the Assembly of the Cluster Red Sequence
• Spectroscopic Determination of the Faint End of the Luminosity Function in the Nearby Galaxy Clusters A2199 and Virgo
• A Chandra archival study of the temperature and metal abundance profiles in hot Galaxy Clusters at 0.1 < z < 0.3
• Substructures in WINGS clusters
• Galaxy Cluster Radio Relics in Adaptive Mesh Refinement Cosmological Simulations: Relic Properties and Scaling Relationships
• The Red-Sequence Luminosity Function in Galaxy Clusters since z~1
• The Luminosity Function of Low-Redshift Abell Galaxy Clusters
• Evolution of BCGs structural parameters in the last $\sim$6 Gyr: feedback processes versus merger events
• The Red Sequence of High-Redshift Clusters: a Comparison with Cosmological Galaxy Formation Models
• Cluster Abell 520: a perspective based on member galaxies. A cluster forming at the crossing of three filaments?
• Internal dynamics of the massive cluster Abell 697: a multiwavelength analysis
• The merging cluster Abell 1758 revisited: multi-wavelength observations and numerical simulations
• Internal dynamics of the radio halo cluster Abell 773: a multiwavelength analysis
• The Luminosity Function of the NoSOCS Galaxy Cluster Sample
• Spectral-based k-corrections and implications for the colour-magnitude relation of E/S0s and its evolution
• Optical analysis of the poor clusters Abell 610, Abell 725, and Abell 796, containing diffuse radio sources
• Common origin for radio relics and halos: galaxy cluster-wide, homogeneous cosmic-ray distribution, and evolving magnetic fields

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