Internal dynamics of the radio--halo cluster A2219: a multi-wavelength analysis

Details Internal dynamics of the radio--halo cluster A2219: a multi-wavelength analysis Internal dynamics of the radio--halo cluster A2219: a multi-wavelength analysis

2003-11-21

arxiv.org/abs/astro-ph/0311497v1

Astron.Astrophys. 416 (2004) 839-851

Astronomy and Astrophysics

Astrophysics

16 pages, 15 figures, accepted for publication on Astronomy & Astrophysics

Scientific paper

10.1051/0004-6361:20034362

We present the results of the dynamical analysis of the rich, hot, and X-ray very luminous galaxy cluster A2219, containing a powerful diffuse radio-halo. Our analysis is based on new redshift data for 27 galaxies in the cluster region, measured from spectra obtained at the TNG, with the addition of other 105 galaxies recovered from reduction of CFHT archive data in a cluster region of about 5 arcmin radius (about 0.8 Mpc h^-1 at the cluster distance) centered on the cD galaxy. The investigation of the dynamical status is also performed by using X-ray data stored in the Chandra archive. Further, valuable information comes from other bands - optical photometric, infrared, and radio data - which are analyzed and/or discussed, too. Our analyses support the view of the connection between extended radio emission and merging phenomena in galaxy clusters.

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