Angle-dependent Compton reflection of X-rays and gamma-rays

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ID: 295651
1995
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Abstract
Using a Monte Carlo method, we derive approximations to Green's functions for the Compton reflection of X-rays and γ-rays by cold electrons. In Compton reflection, X-rays and γ-rays emitted by a source impinge upon a slab (e.g., an accretion disc) and re-emerge with a spectrum altered by Compton scattering and bound-free absorption. The obtained Green's functions are dependent on the viewing angle of the reflecting slab, which extends the previous treatments of the problem, in which the reflected spectra were integrated over all viewing angles. The dependence on the viewing angle is especially important in hard X-rays and soft γ-rays, in which regime the reflected spectrum strongly hardens with increasing viewing angle. This is an important effect for modelling γ-ray spectra of active galactic nuclei and Galactic black hole candidates, where the presence of Compton reflection has been established before from X-ray data.
Reference Key
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Authors P. Magdziarz, A. A. Zdziarski
Journal monthly notices of the royal astronomical society
Year 1995
DOI
10.1093/mnras/273.3.837
URL
https://doi.org/10.1093/mnras/273.3.837
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