One Arc Degree Core Substructure of the Virgo Cluster

Details One Arc Degree Core Substructure of the Virgo Cluster One Arc Degree Core Substructure of the Virgo Cluster

1997-11-25

arxiv.org/abs/astro-ph/9711291v1

Astronomy and Astrophysics

Astrophysics

Latex 14 pages, 2 figures; to appear in Astrofizika

Scientific paper

The results of an analysis of the substructure of 1 degree field galaxies of the Virgo cluster by means of the S-tree technique developed by Gurzadyan et al, are represented. The existence of 3 main subgroups is shown and their dynamical parameters are obtained. The mass centers of the subgroups appear to be aligned in the direction parallel to the elongation of the Virgo cluster. The morphological analysis shows some domination of dwarf galaxies in the subgroup A containing M 87, and existence of two spiral galaxies N4425 and N4461; the latter fact can be crucial for the estimation of the distance of the Virgo cluster by means of the search of Cepheids in that spirals.

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