Multiple merging in the Abell cluster 1367

Luca Cortese, G. Gavazzi, A. Boselli, J. Iglesias-Paramo, L. Carrasco

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Abstract

We present a dynamical analysis of the central ~1.3 square degrees of the cluster of galaxies Abell 1367, based on 273 redshift measurements (of which 119 are news). From the analysis of the 146 confirmed cluster members we derive a significantly non-Gaussian velocity distribution, with a mean location CBI = 6484 ± 81 km s-1 and a scale SBI = 891 ± 58 km s-1. The cluster appears elongated from the North-West to the South-East with two main density peaks associated with two substructures. The North-West subcluster is probably in the early phase of merging into the South-East substructure (~0.2 Gyr before core crossing). A dynamical study of the two subclouds points out the existence of a group of star-forming galaxies Mailing into the core of the South-East subcloud and suggests that two other groups are infalling into the NW and SE subclusters respectively. These three subgroups contain a higher fraction of star-forming galaxies than the cluster core, as expected during merging events. Abell 1367 appears as a young cluster currently forming at the intersection of two filaments.
Original languageEnglish
Pages (from-to)429-441
Number of pages13
JournalAstronomy and Astrophysics
Volume425
Issue number2
DOIs
Publication statusPublished - 2004

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Cortese, L., Gavazzi, G., Boselli, A., Iglesias-Paramo, J., & Carrasco, L. (2004). Multiple merging in the Abell cluster 1367. Astronomy and Astrophysics, 425(2), 429-441. https://doi.org/10.1051/0004-6361:20040381