Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26as..101..475q&link_type=abstract
Astronomy and Astrophysics Supplement, Vol.101, NO. 3/NOVI, P. 475, 1993
Astronomy and Astrophysics
Astrophysics
15
Scientific paper
Spectroscopic data and density counts are presented for this southern cluster, which seems to belong to the outskirts of the Shapley 8 concentration (= A 3555 = SC 1326-311). Using telescopes at the Cerro Tololo Interamerican Observatory and La Silla Observatory a total of 72 galaxy velocities were measured giving a mean redshift of 0.0384 and a global velocity dispersion of 1022 (+99, -77) kms^-1^. A preliminary analysis of velocity and density data suggests the presence of various subgroups. The central core of the cluster is dominated by a very elongated, distorted and diffuse cD galaxy. This cluster may be an example where the cD was formed early in the collapse process of a cluster which has not reached overall virialization yet. The derived X- ray luminosity of ~2 10^44^ ergs^-1^ in the 2-6 keV band places this cluster in the group of strong X-ray cluster sources.
de Souza Ronaldo
Quintana Hernan
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