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2008MNRAS.387.1374M - Mon. Not. R. Astron. Soc., 387, 1374-1390 (2008/July-2)
Global properties of the rich cluster ABCG209 at z ∼ 0.2. Spectroscopic and photometric catalogue.
MERCURIO A., LA BARBERA F., HAINES C.P., MERLUZZI P., BUSARELLO G. and CAPACCIOLI M.
Abstract (from CDS):
The present study shows that the cluster is characterized by a very high value of the line-of-sight velocity dispersion: σv= 1268+93–84km/s, that results in a virial mass of Mvir= 2.95+0.80–0.78x1015h–170M☉ within Rvir= 3.42h–170Mpc. The analysis of the velocity dispersion profile shows that such high value of σv is already reached in the central cluster region. There is evidence of three significant substructures, the primary one having a velocity dispersion of σv= 847+52–49km/s, which makes it consistent with mass estimates from weak lensing analyses.
This observational scenario confirms that ABCG209 is presently undergoing strong dynamical evolution with the merging of two or more subclumps. This interpretation is also supported by the detection of a radio halo suggesting that there is a recent or ongoing merging.
Cluster ETGs follow a Kormendy relation whose slope is consistent with previous studies both at optical and NIR wavelengths. We investigate the origin of the intrinsic scatter of the photometric plane due to trends of stellar populations, using line indices as indicators of age, metallicity and α/Fe enhancement. We find that the chemical evolution of galaxies could be responsible for the intrinsic dispersion of the photometric plane.
Abstract Copyright: © 2008 The Authors. Journal compilation © 2008 RAS
Journal keyword(s): galaxies: clusters: general - galaxies: clusters: individual: ABCG209 - galaxies: distances and redshifts - galaxies: kinematics and dynamics - galaxies: luminosity function, mass function - galaxies: photometry
VizieR on-line data: <Available at CDS (J/MNRAS/387/1374): table1.dat table2.dat table3.dat>
Nomenclature: Tables 1,2,3: [MLH2008] NNN (Nos 1-399) = [MLH2008] JHHMMSS.ss+DDMMSS.s N=399.
Simbad objects: 440