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Astrophysics

Title: Diffuse radio emission in a REFLEX cluster

Authors: L. Feretti (IRA BO), P. Schuecker (MPE Garching), H. Boehringer (MPE Garching), F. Govoni (IRA BO and Univ. BO), G. Giovannini (IRA BO and Univ. BO)
Abstract: Deep Very Large Array radio observations are presented for the REFLEX clusters RXCJ0437.1+0043 and RXCJ1314.4-2515. They are at similar distance and show similar X-ray luminosity, but they are quite different in X-ray structure. Indeed RXCJ0437.1+0043 is regular and relaxed, whereas RXCJ1314.4-2515 is characterized by substructure and possible merging processes. The radio images reveal no diffuse emission in RXCJ0437.1+0043, and a complex diffuse structure in RXCJ1314.4-2515. 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.
Comments: Accepted for publication in A&A. Figures here have been degraded to reduce their size. A version with full resolution figures is available at this http URL
Subjects: Astrophysics (astro-ph)
DOI: 10.1051/0004-6361:20052808
Cite as: arXiv:astro-ph/0508238
  (or arXiv:astro-ph/0508238v2 for this version)

Submission history

From: Luigina Feretti [view email]
[v1] Wed, 10 Aug 2005 15:16:23 GMT (115kb)
[v2] Tue, 16 Aug 2005 08:56:09 GMT (115kb)