S-tree Analysis of the Substructure of the Coma Cluster

V. G. Gurzadyan; A. Mazure

S-tree Analysis of the Substructure of the Coma Cluster

Astrophysics 2007-05-23 v1

Authors: V. G. Gurzadyan , A. Mazure

Abstract

The S-tree method is used to estimate the redshift of the core of Coma cluster - $cz = 6953$ km s $^{-1}$ and dispersion $\sigma=949$ km s $^{-1}$ . The existence of three subgroups of galaxies is revealed, one of them is associated with the cD galaxy NGC 4874, another - with NGC 4889. It is argued that these subgroups are 'galaxy associations', i.e. galactic dynamical entities moving through the main cluster. The non-stationarity of the dynamical processes ongoing in the Coma core is concluded.

Keywords

galaxy clusters dynamical structure redshift determination substructure analysis

Cite

@article{arxiv.astro-ph/9710094,
  title  = {S-tree Analysis of the Substructure of the Coma Cluster},
  author = {V. G. Gurzadyan and A. Mazure},
  journal= {arXiv preprint arXiv:astro-ph/9710094},
  year   = {2007}
}

Comments

to appear in the proceedings of Coma Cluster meeting (Marseille, June, 1997)

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