First LOFAR observations at very low frequencies of cluster-scale non-thermal emission: The case of Abell 2256
van Weeren, R J; Rottgering, Hubb; Rafferty, D A; Pizzo, R; Bonafede, A; Bruggen, M; Brunetti, G; Ferrari, C; Orru, E; Heald, G; Butcher, Harvey; McKean, J P; Shulevski, Alexander; van Bemmel, Illse; Miley, George; Hoeft, M; Wise, M J; Anderson, J M; Asgekar, A; Bell, Michael R; Bentum, M J; Bernardi, G; Brouw, W. N.; Ciardi, Benedetta; Garrett, M A; Gunst, A W; van Haarlem, M P; Hamaker, Johan P.; Hessels, J. W. T.; Koopmans, L. V. E.; Kuper, G.; van Leeuwen, J; Maat, P; Munk, H; Nijboer, R; Pandey-Pommier, M; Polatidis, A.G.; Reich, W; Schoenmakers, Arno; Sluman, J; Tang, Y; Vermeulen, R.C.; de Vos, Marco
Abell 2256 is one of the best known examples of a galaxy cluster hosting large-scale diffuse radio emission that is unrelated to individual galaxies. It contains both a giant radio halo and a relic, as well as a number of head-tail sources and smaller diffuse steep-spectrum radio sources. The origin of radio halos and relics is still being debated, but over the last years it has become clear that the presence of these radio sources is closely related to galaxy cluster merger events. Here we...[Show more]
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