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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 225809.0, MPI für Astronomie / Publikationen_mpia
Quantitative morphology of galaxies in the core of the Coma cluster
Authors:Gutiérrez, Carlos M.; Trujillo, Ignacio; Aguerri, Jose A. L.; Graham, Alister W.; Caon, Nicola
Date of Publication (YYYY-MM-DD):2004
Title of Journal:The Astrophysical Journal
Volume:602
Start Page:664
End Page:677
Review Status:not specified
Audience:Not Specified
Abstract / 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 S‚‚eacute;rsic 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 S‚‚eacute;rsic index
n‚‚lt;2 (dwarfs) and those with n‚‚gt;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.
Free Keywords:Galaxies: Clusters: General; Galaxies:
; Clusters: Individual: Name: Coma; Galaxies:
; Fundamental Parameters; Galaxies: Kinematics and
; Dynamics; Galaxies: Photometry; Galaxies:
; Structure
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
External Affiliations:Canarias, E-38205, La Laguna, Tenerife, Spain),
AB(Instituto de Astrof‚‚iacute;sica de Canarias,
E-38205, La Laguna, Tenerife, Spain; Current
address: Max-Planck-Institut f‚‚uuml;r
Astronomie, K‚‚ouml;nigstuhl 17, D-69117
Heidelberg, Germany.), AC(Instituto de
Astrof‚‚iacute;sica de Canarias, E-38205, La
Laguna, Tenerife, Spain), AD(Department of
Astronomy, University of Florida, Gainesville, FL
32611), AE(Instituto de Astrof‚‚iacute;sica de
Canarias, E-38205, La Laguna, Tenerife, Spain)
Identifiers:URL:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bi... [ID No:1]
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