Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-07-06
Mon.Not.Roy.Astron.Soc. 318 (2000) 180
Astronomy and Astrophysics
Astrophysics
8 pages, 8 figures; accepted for publication in MNRAS
Scientific paper
We present the results of both analytical and numerical calculations of the amplitude of the reflection component in X-ray spectra of galactic black hole systems. We take into account the anisotropy of Compton scattering and the systematic relativistic bulk motion of the hot plasma. In the case of single scattering approximation the reflection from the disc surface is significantly enhanced due to the anisotropy of Compton scattering. On the other hand the calculations of multiple scattering obtained using the Monte Carlo method show that the anisotropy effect is much weaker in that case. Therefore, the enhanced backscattered flux may affect the observed spectra only if the disc surface is highly ionized, which reduces the absorption in the energy band corresponding to the first Compton scattering.
Czerny Bozena
Janiuk Agnieszka
Zycki Piotr T.
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