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Issue A&A
Volume 376, Number 3, September IV 2001
Page(s) 803 - 819
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20011016



A&A 376, 803-819 (2001)
DOI: 10.1051/0004-6361:20011016

Radio and X-ray diffuse emission in six clusters of galaxies

F. Govoni1, 2, L. Feretti2, G. Giovannini2, 3, H. Böhringer4, T. H. Reiprich4 and M. Murgia2, 3

1  Dipartimento di Astronomia, Univ. Bologna, Via Ranzani 1, 40127 Bologna, Italy
2  Istituto di Radioastronomia -CNR, via Gobetti 101, 40129 Bologna, Italy
3  Dipartimento di Fisica, Univ. Bologna, Via B. Pichat 6/2, 40127 Bologna, Italy
4  Max-Planck-Institut für Extraterrestrische Physik, PO Box 1603, 85740 Garching, Germany

(Received 30 March 2001 / Accepted 6 July 2001)

Abstract
Deep Very Large Array radio observations confirm the presence of halo and relic sources in six clusters of galaxies (A115, A520, A773, A1664, A2254, A2744) where a wide diffuse emission was previously found in the NRAO VLA Sky Survey. New images at 1.4 GHz of these six clusters of galaxies are presented and X-ray data obtained from the ROSAT archive are analyzed. The properties of clusters hosting radio halos and relics are analyzed and discussed. A correlation between the halo radio power and the cluster gravitational mass is presented.


Key words: galaxies: clusters: general -- intergalactic medium -- magnetic fields -- radio continuum: general -- X-rays: general

Offprint request: F. Govoni, fgovoni@ira.bo.cnr.it

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© ESO 2001


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