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Issue A&A
Volume 400, Number 2, March III 2003
Page(s) 465 - 476
Section Galactic structure and dynamics
DOI http://dx.doi.org/10.1051/0004-6361:20030044



A&A 400, 465-476 (2003)
DOI: 10.1051/0004-6361:20030044

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

(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

Offprint request: L. Feretti

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© ESO 2003


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