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An Ultra-Steep Spectrum Radio Relic in the Galaxy Cluster Abell 2443
Aaron Cohen, Tracy E Clarke
We present newly discovered radio emission in the galaxy cluster Abell 2443 which is (1) diffuse, (2) extremely steep spectrum, (3) offset from the cluster center, (4) of irregular…
A search for steep spectrum radio relics and halos with the GMRT
R. J. van Weeren, H. J. A. Rottgering, M. Bruggen +1
Context: Diffuse radio emission, in the form of radio halos and relics, traces regions in clusters with shocks or turbulence, probably produced by cluster mergers. Some models of d…
Diffuse radio emission in the merging cluster MACS J0717.5+3745: the discovery of the most powerful radio halo
R. J. van Weeren, H. J. A. Rottgering, M. Bruggen +1
Hierarchical models of structure formation predict that galaxy clusters grow via mergers of smaller clusters and galaxy groups, as well as through continuous accretion of gas. MACS…