Particle acceleration and origin of the hard X-rays in halos of clusters of galaxies

Details Particle acceleration and origin of the hard X-rays in halos of clusters of galaxies Particle acceleration and origin of the hard X-rays in halos of clusters of galaxies

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.459..139d&link_type=abstract

In: Exploring the gamma-ray universe. Proceedings of the Fourth INTEGRAL Workshop, 4-8 September 2000, Alicante, Spain. Editor:

Computer Science

4

Clusters Of Galaxies, X Rays, Particle Acceleration

Scientific paper

We analyse models of hard X-ray production in clusters of galaxies. The inverse Compton origin of these X-rays seems to be problematic since it requires rather specific parameters for the photon production. The model of bremsstrahlung radiation by suprathermal electrons if they are accelerated from the thermal pool requires a characteristic acceleration time of the order of 1015sec to explain the observed X-ray flux from the Coma cluster. In the case of proton bremsstrahlung origin a more conservative acceleration compared to that of electrons is sufficient to explain the X-ray data. In the last case the X-ray emission should be accompanied by nuclear gamma-ray line flux.

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