Hard X-Ray Emission from Clusters of Galaxies
We analyze the origin of the flux of hard X-rays from the Coma
cluster observed by the Beppo-SAX telescope. It is used to
assume that this flux is produced by nonthermal particles
accelerated in the Coma medium. We show, however, that in the
case of in-situ acceleration of particles from the thermal
pool the bremsstrahlung radiation of hard X-rays is generated
by thermal particles whose spectrum is distorted by the
acceleration. This mimic the effect of a two-temperature
thermal spectrum. A power-law nonthermal spectrum of
accelerated particles is formed at much higher energies.
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On 16 Jul 1999, 09:19.