Bibcode
DOI
Gutiérrez, Carlos M.; Trujillo, I.; Aguerri, Jose A. L.; Graham, Alister W.; Caon, N.
Bibliographical reference
The Astrophysical Journal, Volume 602, Issue 2, pp. 664-677.
Advertised on:
2
2004
Journal
Citations
68
Refereed citations
61
Description
We present a quantitative morphological analysis of 187 galaxies in a
region covering the central 0.28 deg2 of the Coma Cluster.
Structural parameters from the best-fitting Sérsic
r1/n bulge plus, where appropriate, exponential disk model,
are tabulated here. This sample is complete down to a magnitude of R=17
mag. By examining the recent compilation by Edwards et al. of galaxy
redshifts in the direction of Coma, we find that 163 of the 187 galaxies
are Coma Cluster members and that the rest are foreground and background
objects. For the Coma Cluster members, we have studied differences in
the structural and kinematic properties between early- and late-type
galaxies and between the dwarf and giant galaxies. Analysis of the
elliptical galaxies reveals correlations among the structural parameters
similar to those previously found in the Virgo and Fornax Clusters.
Comparing the structural properties of the Coma Cluster disk galaxies
with disk galaxies in the field, we find evidence for an environmental
dependence: the scale lengths of the disk galaxies in Coma are 30%
smaller. An analysis of the kinematics shows marginal differences
between the velocity distributions of elliptical galaxies with
Sérsic index n<2 (dwarfs) and those with n>2 (giants), the
dwarf galaxies having a greater (cluster) velocity dispersion. Finally,
our analysis of all 421 background galaxies in the catalog of Edwards et
al. reveals a nonuniform distribution in redshift with contrasts in
density of ~3, characterized by a void extending from ~10,000 to ~20,000
km s-1, and two dense and extended structures centered at
~20,000 and ~47,000 km s-1.