Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..587..385m&link_type=abstract
GAMMA 2001: Gamma-Ray Astrophysics 2001. AIP Conference Proceedings, Volume 587, pp. 385-389 (2001).
Astronomy and Astrophysics
Astrophysics
X-Ray Sources, X-Ray Bursts, Magnetohydrodynamics And Plasmas, Atomic And Molecular Data, Spectra, And Spectral Parameters
Scientific paper
We compute the hard X-ray spectra produced by Comptonization process in a hot plasma which volume is pervaded by small cold dense clouds. Hard X-rays impinging on the clouds are partly reprocessed and thermally reemited, contributing in feeding the hot phase with soft photons, partly reflected, contributing to the formation of a hump in the high energy spectrum. The main cooling mechanism of the hot plasma is Compton cooling by the soft thermal emission from the cold clouds. Using a non-linear Monte-Carlo code, we compute the equilibrium temperature together with the escaping spectrum. The spectrum depends mainly on the amount of cold matter filling the hot phase. It is constrained to be very low in order to produce spectra similar to those observed in Seyfert galaxies and X-ray binaries. An additional external reflector is required in order to reproduce the full range of observed reflection amplitudes. .
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