New evidence for a linear colour-magnitude relation and a single Schechter function for red galaxies in a nearby cluster of galaxies down to M*+8

Abstract

The colour and luminosity distributions of red galaxies in the cluster Abell 1185 (z=0.0325) were studied down to M*+8 in the B, V and R bands. The colour-magnitude (hereafter CM) relation is linear without evidence for a significant bending down to absolute magnitudes which are seldom probed in literature (M_R=-12.5 mag). The CM relation is thin (+/-0.04 mag) and its thickness is quite independent from the magnitude. The luminosity function of red galaxies in Abell 1185 is adequately described by a Schechter function, with a characteristic magnitude and a faint end slope that also well describe the LF of red galaxies in other clusters. There is no passband dependency of the LF shape other than an obvious M* shift due to the colour of the considered population. Finally, we conclude that, based on colours and luminosity, red galaxies form an homogeneous population over four decades in stellar mass, providing a second evidence against faint red galaxies being a recent cluster population.

MNRAS, in press. Fig 1 degraded to fit arxiv file size constraints

References in corpus (19)

• Dwarf Galaxies of the Local Group
• The ACS Virgo Cluster Survey. VI. Isophotal Analysis and the Structure of Early-Type Galaxies
• How many cosmological parameters?
• The properties and luminosity function of extremely low luminosity galaxies
• The Build-up of the Colour-Magnitude Relation as a Function of Environment
• Down-Sizing in Galaxy Formation at z~1 in the Subaru/XMM-Newton Deep Survey (SXDS)
• The build-up of the red-sequence in galaxy clusters since z~0.8
• The VIRMOS deep imaging survey II: CFH12K BVRI optical data for the 0226-04 deep field
• Galaxy Populations and Evolution in Clusters II: Defining Cluster Populations
• Dwarf Galaxies in the Coma Cluster. II. Photometry and Analysis
• The Build-up of the Red Sequence in the galaxy cluster MS1054-0321 at z=0.831
• Broad-band colors and overall photometric properties of template galaxy models from stellar population synthesis
• The Butcher--Oemler effect at z~0.35: a change in perspective
• Rigorous luminosity function determination in presence of a background: theory and application to two intermediate redshift clusters
• Dissecting the luminosity function of the Coma cluster of galaxies using CFHT wide field images
• Homogeneity of early-type galaxies across clusters
• The Early-type Dwarf-to-Giant Ratio and Substructure in the Coma Cluster
• Extending the Butcher--Oemler effect up to z~0.7
• The Fornax Spectroscopic Survey: The Number of Unresolved Compact Galaxies

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