The Morphology Dependence of Luminosity Segregation in the Coma Cluster

Abstract

We carry out CCD photometry of galaxies in the 5.25 square region centered on Coma cluster down to $M_R=-16.0$, beyond the limit of conventional morphological classification. We use the angular two-point correlation function as well as radial profiles in order to characterize the luminosity segregation. We find strong luminosity segregation for our total sample over the magnitude range of $-20\le M_R\le -16$, which is not entirely accounted for in terms of the morphology-density relation that is known to exist only for bright galaxies. We use a single consistent parameter, the degree of luminosity concentration, to parameterize the morphology of galaxies over the wide magnitude range, where both giant and dwarf galaxies are included. Galaxies with high central concentration (HCC) show strong luminosity segregation, i.e. their clustering strength depends strongly on luminosity while those with low central concentration (LCC) show almost no luminosity segregation. Radial density profile shows that brighter HCC-type galaxies tend to more strongly concentrate near the cluster center while LCC-type galaxies do not show such a dependence on luminosity. We show that these results are tenable against the contamination by field galaxies and uncertainties in our method of classification.

arXiv comment38 pages, 12 figures. Accepted for publication in Astrophysical Journal. Also available at http://zone.mtk.nao.ac.jp/~kashik/2pcf.html

References in corpus (3)

• Dwarf Elliptical Galaxies
• The Stromlo-APM Redshift Survey II. Variation of Galaxy Clustering with Morphology and Luminosity
• Clustering of Galaxies in the Hubble Deep Field

Cited by in corpus (19)

• Populating a cluster of galaxies - I. Results at z=0
• Environmental Effects on Late-Type Galaxies in Nearby Clusters
• The ESO Nearby Abell Cluster Survey. XI. Segregation of cluster galaxies and subclustering
• The Mass Profile of the Coma Galaxy Cluster
• Star Formation in a Complete Spectroscopic Survey of Galaxies
• Quantitative Morphology of Galaxies in the Core of the Coma Cluster
• The First Hour of Extra-galactic Data of the Sloan Digital Sky Survey Spectroscopic Commissioning: The Coma Cluster
• The Low Surface Brightness Extent of the Fornax Cluster
• Constraining the Collisional Nature of the Dark Matter Through Observations of Gravitational Wakes
• Luminosity segregation in three clusters of galaxies (A119, 2443, 2218)
• The ESO Nearby Abell Cluster Survey IX. The morphology-radius and morphology-density relations in rich galaxy clusters
• K-band luminosity (mass) segregation in AC118 at z=0.31
• The descendents of Lyman Break Galaxies in galaxy clusters: spatial distribution and orbital properties
• Galaxy Properties in Clusters: Dependence on the Environment and the Cluster Identification Techniques
• Galaxy Associations within the Coma Cluster
• Shape of the Galactic Orbits in the CNOC1 Clusters
• Photometric observations of Southern Abell Cluster Redshifts Survey Clusters: Structure of galaxies in the inner region of clusters of galaxies
• The Galaxy Population of the Core of Coma Cluster
• Clustering of Local Group distances: publication bias or correlated measurements? VII. A distance framework out to 100 Mpc