The Galaxy Luminosity Functions down to M~-10 in the Hydra I Cluster

Abstract

We study the galaxy population in the central region and a region about 0.6 Mpc away from the center of the Hydra I cluster in B- and Rc-bands down to M~-10 using the Subaru Suprime-Cam photometry. We find that the luminosity function of the entire population has a slightly steeper slope (alpha~-1.6) in the range of -20<M<-10 than those reported for other clusters in slightly brighter ranges. The slope appears to be steeper in poorer clusters. The number of faint galaxies (M>-14) increases in the cluster center as well as bright galaxies. The Hydra I cluster is dominated by red dwarfs and the luminosity function shows a significant upturn at M~-16 as is seen in several other nearby clusters, but not in the field. This upturn and the variation in the faint-end slope of the luminosity function may be caused by the cluster environment or the evolution history of individual clusters.

arXiv comment21 pages, 6 figures, submitted to AJ

References in corpus (37)

• Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
• The Sloan Digital Sky Survey: Technical Summary
• Galaxy Harassment and the Evolution of Clusters of Galaxies
• The Fourth Data Release of the Sloan Digital Sky Survey
• The Mass Function of an X-Ray Flux-Limited Sample of Galaxy Clusters
• Resolving the Structure of Cold Dark Matter Halos
• Subaru Prime Focus Camera -- Suprime-Cam --
• The ROSAT Brightest Cluster Sample (BCS) - I. The compilation of the sample and the cluster log N-log S distribution
• Subaru Deep Survey V. A Census of Lyman Break Galaxies at z=4 and 5 in the Subaru Deep Fields: Photometric Properties
• The properties and luminosity function of extremely low luminosity galaxies
• A Deep, Wide Field, Optical, and Near Infrared Catalog of a Large Area around the Hubble Deep Field North
• A class of compact dwarf galaxies from disruptive processes in galaxy clusters
• Galaxy Number Counts from the Sloan Digital Sky Survey Commissioning Data
• The 2dF Galaxy Redshift Survey: the luminosity function of cluster galaxies
• The Luminosity Function of the Coma Cluster Core for -25<M_R<-11
• Galaxy threshing and the formation of ultra-compact dwarf galaxies
• ESO Imaging Survey. Deep Public Survey: Multi-Color Optical Data for the Chandra Deep Field South
• Current Performance and On-Going Improvements of the 8.2 m Subaru Telescope
• Near-Infrared and Optical Luminosity Functions from the 6dF Galaxy Survey
• RASS-SDSS galaxy cluster survey. II. A unified picture of the Cluster Luminosity Function
• Galaxy Luminosity Functions from Deep Spectroscopic Samples of Rich Clusters
• Galaxy Populations and Evolution in Clusters II: Defining Cluster Populations
• The dwarf Low Surface Brightness galaxy population of the Virgo Cluster I. The faint-end-slope of the Luminosity Function
• Abell 2255: Increased Star Formation and AGN Activity in a Cluster-Cluster Merger
• Dwarf Galaxies in the Coma Cluster. II. Photometry and Analysis
• Dwarf Spheroidal Galaxies in the Virgo Cluster
• Faint dwarf spheroidals in the Fornax Cluster: A flat luminosity function
• Comparison of Analytical Mass Functions with Numerical Simulations
• The Galaxy Luminosity Function from M_R = -25 to M_R = -9
• Dissecting the luminosity function of the Coma cluster of galaxies using CFHT wide field images
• A deep wide survey of faint low surface brightness galaxies in the direction of the Coma cluster of galaxies
• A wide field survey at the Northern Ecliptic Pole: II. Number counts and galaxy colours in B_j, R, and K
• The Low Surface Brightness Extent of the Fornax Cluster
• 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
• A Deep Radio Survey of Abell 2125 II: Accelerated Galaxy Evolution during a Cluster-Cluster Merger
• Gas, Iron and Gravitational Mass in Galaxy Clusters: The General Lack of Cluster Evolution at z < 1.0
• The Faint End of the Luminosity Function in the Core of the Coma Cluster

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