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2005AJ....130...47L - Astron. J., 130, 47-54 (2005/July-0)
The cluster of galaxies surrounding Cygnus A. II. New velocities and a dynamic model.
LEDLOW M.J., OWEN F.N. and MILLER N.A.
Abstract (from CDS):
We have spectroscopically identified 77 new members of the Cygnus A cluster, bringing to 118 the total number of galaxies consistent with cluster membership. We use these data, combined with the results from X-rays, to deduce a dynamical model for the system. The data are consistent with a cluster-cluster merger viewed at a projection angle of 30°-45°, 0.2-0.6 Gyr prior to core passage. We estimate the richness of the combined cluster system at an Abell richness class 2 or greater, suggesting the merger of two richness class ∼1 clusters.
Abstract Copyright: ∼
Journal keyword(s): Galaxies: Active - Galaxies: Clusters: Individual: Name: Cygnus A - Galaxies: Distances and Redshifts - Galaxies: Individual: Name: Cygnus A
VizieR on-line data: <Available at CDS (J/AJ/130/47): table1.dat table2.dat>
Nomenclature: Tables 1, 2: [LOM2005] JHHMMSS.ss+DDMMSS.s N=118+362.
Simbad objects: 478
