The Structure of Clusters with Bimodal Distributions of Galaxy Radial Velocities. I. A1035

Details The Structure of Clusters with Bimodal Distributions of Galaxy Radial Velocities. I. A1035 The Structure of Clusters with Bimodal Distributions of Galaxy Radial Velocities. I. A1035

2009-12-13

arxiv.org/abs/0912.2501v1

Astrophys.Bull.62:311,2007

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

13 pages, 3 tables, 6 figures

Scientific paper

10.1134/S1990341307040025

The structure of the A1035 cluster of galaxies (10h32m +40d13', cz ~ 22000 km/s), which exhibits a bimodal distribution of galaxy radial velocities (\Delta V\approx 3000 km/s), is analyzed using three methods of determining the relative distances to clusters from early-type galaxies: the Kormendy relation corrected for the dependence of residuals on galaxy magnitude, the photometric plane, and the fundamental plane. We use the data obtained with the 1-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences and SDSS (DR5) data to show that A1035 consists of two gravitationally unbound independent clusters. These clusters with the velocity dispersions of 566 km/s and 610 km/s and masses within R_200 equal to 2.7 10^14 and 3.5 10^14 M_sun, respectively, obey the Hubble law.

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