Recovering the Internal Dynamics and the Shapes of Galaxy Clusters: Virgo Cluster

Details Recovering the Internal Dynamics and the Shapes of Galaxy Clusters: Virgo Cluster Recovering the Internal Dynamics and the Shapes of Galaxy Clusters: Virgo Cluster

2001-07-16

arxiv.org/abs/astro-ph/0107265v1

Int.J.Mod.Phys. D11 (2002) 581-597

Astronomy and Astrophysics

Astrophysics

to appear in Int.Journ.Mod.Phys.D

Scientific paper

10.1142/S0218271802001640

We describe a method for recovering of the substructure, internal dynamics and geometrical shapes of clusters of galaxies. Applying the method to the Virgo cluster, we, first, reveal the substructure of the central 4 arc degree field of the Virgo cluster by means of S-tree technique. The existence of three main subgroups of galaxies is revealed and their dynamical characteristics are estimated. Then, using the previously suggested technique (Gurzadyan and Rauzy 1997), the bulk flow velocities of the subgroups are evaluated based on the distribution of the redshifts of the galaxies. The results enable us also to obtain a secure indication of the elongation of the Virgo cluster and its positional inclination.

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