Deep images of cluster radio halos

M. Bacchi; L. Feretti; G. Giovannini; F. Govoni

doi:doi:10.1051/0004-6361:20030044

Free Access

Issue		A&A Volume 400, Number 2, March III 2003


Page(s)		465 - 476
Section		Extragalactic astronomy
DOI		https://doi.org/10.1051/0004-6361:20030044
Published online		03 March 2003

A&A 400, 465-476 (2003)

Deep images of cluster radio halos

M. Bacchi¹^,2, L. Feretti², G. Giovannini²^,3 and F. Govoni²^,3

¹ Dipartimento di Fisica, Univ. Bologna, Via B. Pichat 6/2, 40127 Bologna, Italy
² Istituto di Radioastronomia – CNR, via Gobetti 101, 40129 Bologna, Italy
³ Dipartimento di Astronomia, Univ. Bologna, Via Ranzani 1, 40127 Bologna, Italy

L. Feretti

Received: 17 October 2002
Accepted: 9 January 2003

Abstract

New radio data are presented for the clusters A401, A545, A754, A1914, A2219 and A2390, where the presence of diffuse radio emission was suggested from the images of the NRAO VLA Sky Survey. Sensitive images of these clusters, obtained with the Very Large Array (VLA) at 20 cm confirm the existence of the diffuse sources and allow us to derive their fluxes and intrinsic parameters. The correlation between the halo radio power and cluster X-ray luminosity is derived for a large sample of halo clusters, and is briefly discussed.

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

© ESO, 2003

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