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Computations of Compton scattering redistribution function in plasma | | J. Madej
; A. Różańska
; A. Majczyna
; M. Należyty
; | | Date: |
13 Feb 2016 | | Abstract: | Compton scattering is the dominant opacity source in hot neutron stars,
accretion disks around black holes and hot coronae. We present here a set of
numerical expressions of the Compton scattering redistribution functions for
unpolarized radiation, which are more exact than the widely used Kompaneets
equation. This paper fulfills three goals: 1. We have organized three existing
algorithms into a form ready to use in radiative transfer and model atmosphere
codes. 2. We present the correct algorithm derived first by Guilbert (1981). 3.
We modify the exact algorithm by Suleimanov et al. (2012) in order to use it
for the scattering in a very wide spectral range from hard X- rays to radio
waves. We present sample computations of the Compton scattering redistribution
functions in thermal plasma at temperatures corresponding to the atmospheres of
bursting neutron stars and hot intergalactic medium. Our formulae are also
useful to the study Compton scattering of unpolarised microwave background
radiation in hot intra-cluster gas and the Sunyaev-Zeldovich effect. We
conclude, that the formulae by Guilbert (1981) and Suleimanov et al. (2012)
yield practically the same numerical results for gas temperatures relevant to
the atmospheres of X-ray bursting neutron stars, $T le 10^8$ K. | | Source: | arXiv, 1602.5088 | | Services: | Forum | Review | PDF | Favorites | |
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