Non-linear shock acceleration and high energy gamma rays from clusters of 
galaxies

Stawarz, L.; Ostrowski, M.; Sikora, M.; Siemiginowska, A.

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Non-linear shock acceleration and high energy gamma rays from clusters of galaxies

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Stawarz, L.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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Sikora, M.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

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Stawarz, L., Ostrowski, M., Sikora, M., & Siemiginowska, A. (2005). Non-linear shock acceleration and high energy gamma rays from clusters of galaxies. In F. A. Aharonian, H. J. Völk, & D. (. Horns (Eds.), High Energy Gamma-Ray Astronomy (pp. 561-567). New York, NY: American Institute of Physics.

Cite as: http://hdl.handle.net/11858/00-001M-0000-0011-8992-C

Abstract

Merger and accretion shocks in clusters of galaxies can accelerate particles via first order Fermi process. Since this mechanism is believed to be intrinsically efficient, shocks are expected to be modified by the backreaction of the accelerated particles. Such a modification might induce appreciable effects on the non-thermal emission from clusters and a suppression of the heating of the gas at strong shocks. Here we consider in particular the gamma ray emission and we discuss the capability of Cherenkov telescopes such as HESS to detect clusters at TeV energies.