2005/08/16 by L. Feretti, P. Schuecker, H. Böhringer +3 · 1 citation
Physics and Astronomy · #Astrophysical Phenomena and Observations #Astrophysics #Cluster (spacecraft) #Computer network #Computer science #Galaxies: Formation, Evolution, Phenomena #Galaxy #Gamma-ray bursts and supernovae #Halo #Luminosity #Physics #Radio halo #Substructure #astro-ph
paper · pdf · doi:10.1051/0004-6361:20052808
Accepted for publication in A&A. Figures here have been degraded to reduce their size. A version with full resolution figures is available at http://www.ira.cnr.it/~lferetti/OUTGOING/papREFLEX.ps.gz
arxiv created 2005/08/16 · openalex publication_date 2005/11/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.