Revealing Galaxy Associations in Abell 119

Details Revealing Galaxy Associations in Abell 119 Revealing Galaxy Associations in Abell 119

1996-10-09

arxiv.org/abs/astro-ph/9610056v1

Astronomy and Astrophysics

Astrophysics

Latex file, 7 pages, 2 figures, .ps files can be obtained from the authors. To appear in The Observatory, vol.116, No.1134, 19

Scientific paper

We report the results of an analysis of the hierarchical properties of the cluster of galaxies Abell 119. Observational data from the ESO Nearby Abell Cluster Survey (ENACS) are used, complemented by data from previous studies, while the analysis is performed with the S-tree method. The main physical system and its three subgroups with truncated Gaussian velocity distributions are identified; due to their remarkable physical features and possible cosmogonical mission we call these subgroups ``galaxy associations''. The mass centre of the core of main system is shown to coincide with the X-ray centre of the cluster. An alignment of the mass centres of the 3 galaxy associations is also shown.

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