Photometric Properties of Galaxies in the Cluster DC 1842-63
Abstract
A compilation of photometric and kinematic observations in the southern cluster DC 1842-63 is presented. This includes new total magnitudes for 174 galaxies and surface photometry for 31 galaxies. Bulge-to-disk ratios are determined for the galaxies with surface photometry. New redhsift measurements for 20 galaxies are also presented. Visually, DC 1842-63 appears to have some substructure, with a well-defined groups of mostly spiral and S0 galaxies situated about 13' from the cluster center. Based on redshift measurements for 42 cluster members, the mean cluster velocity is 4437+/-78 km s^-1^ and the chlster velocity dispersion is 507 km s^-1^. There is no dynamical evidence for subclustering. The luminosity function of DC 1842-63 shows no significant depletion of bright galaxies, but, like many clusters, DC 1842-63 does have a fairly flat distribution of fainter galaxies. The Faber-Jackson relation between the luminosity of the spheroidal component and the central stellar velocity dispersion yields L is proportional to σ^3.1+/-1.1^, in good agreement with earlier findings for the Virgo and Coma clusters. The X-ray luminosity of DC 1842-63 is 3.0 x 10^43^ erg s^-1^ in the 0.5 to 4.5 keV band, typical for a cluster of this type.
- Publication:
-
The Astrophysical Journal Supplement Series
- Pub Date:
- May 1989
- DOI:
- 10.1086/191334
- Bibcode:
- 1989ApJS...70..139B
- Keywords:
-
- Astronomical Photometry;
- Galactic Clusters;
- Galactic Bulge;
- Luminosity;
- Red Shift;
- X Ray Sources;
- Astrophysics;
- GALAXIES: CLUSTERING;
- GALAXIES: PHOTOMETRY;
- GALAXIES: REDSHIFTS