We report the results about the internal dynamics of the rich galaxy cluster ABGC209 on the basis of new spectroscopic and photometric data. ABCG209 is a peak of 112 detected member galaxies at z= 0:209, characterised by a high value of the line–of–sight velocity dispersion, ¾v » 1400 km s¡1. The cluster shows evidence of relevant substructure and dynamical segregation, and is characterised by a preferential SE–NW direction. The observational scenario suggests that ABCG209 is a strongly evolving cluster, possibly in an advanced phase of merging.
Internal Dynamics of ABCG 209 at z ~ 0.21 / A., M., Girardi, M., W., B., P., M., G., B.. - In: MEMORIE DELLA SOCIETÀ ASTRONOMICA ITALIANA. - ISSN 1824-016X. - STAMPA. - 3:(2003), pp. 214-217. (- 47th Annual Meeting of the Italian Astronomical Society Nuove frontiere dell'Astronomia Italiana Trieste, Italy 14-17 Aprile 2003).
Internal Dynamics of ABCG 209 at z ~ 0.21
GIRARDI, MARISA;
2003-01-01
Abstract
We report the results about the internal dynamics of the rich galaxy cluster ABGC209 on the basis of new spectroscopic and photometric data. ABCG209 is a peak of 112 detected member galaxies at z= 0:209, characterised by a high value of the line–of–sight velocity dispersion, ¾v » 1400 km s¡1. The cluster shows evidence of relevant substructure and dynamical segregation, and is characterised by a preferential SE–NW direction. The observational scenario suggests that ABCG209 is a strongly evolving cluster, possibly in an advanced phase of merging.Pubblicazioni consigliate
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