Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-04-26
Astronomy and Astrophysics
Astrophysics
7 pages, 4 figures, Invited Talk in IAU colloquium 195-"Outskirts of galaxy clusters: intense life in the suburbs", Torino, It
Scientific paper
10.1017/S174392130400033X
The discovery of diffuse synchrotron radio emission and, more recently, of the hard X-ray (HXR) tails have triggered a growing interest about non-thermal phenomena in galaxy clusters. After a brief review of the most important evidences for non-thermal emission, I will focus on the origin of the emitting particles and of the hadronic component. In particular I will describe the particle-injection and -acceleration mechanisms at work in the intra-cluster medium (ICM) and, at the same time, discuss the possibility to test current modellings of these phenomena with future radio, HXR, and gamma rays observatories.
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