Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-08-10
Astronomy and Astrophysics
Astrophysics
Accepted for publication in A&A. Figures here have been degraded to reduce their size. A version with full resolution figures
Scientific paper
10.1051/0004-6361:20052808
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.
Boehringer Hans
Feretti Luigina
Giovannini Gabriele
Govoni Federica
Schuecker Peter
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