Hard X-ray emission from clusters of Galaxies

Dogiel, V. A.
April 2000
AIP Conference Proceedings;2000, Vol. 510 Issue 1, p452
Academic Journal
We analyze the origin of the flux of hard X-rays from the Coma cluster observed with the Beppo-SAX telescope. It is often assumed that this flux is produced by nonthermal particles in-situ accelerated in the Coma halo. We show, however, that in the case of in-situ acceleration the hard X-ray flux may be generated by thermal particles whose spectrum is distorted by the acceleration. This mimic the effect of two-temperature distribution of the bremsstrahlung X-ray emission. A power-law non-thermal spectrum is formed at energies much higher than the energy range observed by Beppo-SAX. © 2000 American Institute of Physics.


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