Volume 444, Number 1, December II 2005
|Page(s)||157 - 164|
|Published online||21 November 2005|
Diffuse radio emission in a REFLEX cluster
Istituto di Radioastronomia – INAF, via Gobetti 101, 40129 Bologna, Italy e-mail: firstname.lastname@example.org
2 Max Planck Institut für Extraterrestrische Physik, PO Box 1312, 85741 Garching, FRG
3 Dipartimento di Astronomia, Univ. Bologna, Via Ranzani 1, 40127 Bologna, Italy
Accepted: 16 July 2005
Deep Very Large Array radio observations are presented for the REFLEX clusters and . They are at similar distances and show similar X-ray luminosity, but they are quite different in X-ray structure. Indeed is regular and relaxed, whereas is characterized by substructure and possible merging processes. The radio images reveal the lack of diffuse emission in and the presence of a complex diffuse structure in . The diffuse source in the latter cluster consists of a central radio halo which extends to the West toward the cluster periphery and bends to the North to form a possible relic. Another extended source is detected in the eastern cluster peripheral region. Although there could be plausible optical identifications for this source, it might also be a relic candidate owing to its very steep spectrum. The present results confirm the tight link between diffuse cluster radio sources and cluster merger processes.
Key words: galaxies: clusters: general / galaxies: intergalactic medium / radio continuum: general / X-rays: general
© ESO, 2005
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