Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979afz....15..165b&link_type=abstract
(Astrofizika, vol. 15, Jan.-Mar. 1979, p. 165-178.) Astrophysics, vol. 15, no. 1, July 1979, p. 99-107. Translation.
Astronomy and Astrophysics
Astrophysics
Astronomical Models, Astrophysics, Radiation Pressure, Stellar Atmospheres, Wave Propagation, Black Holes (Astronomy), Galactic Nuclei, High Pressure, Supermassive Stars, X Ray Sources
Scientific paper
A study is made of wave propagation in the atmospheres of astrophysical objects - accretion disks around black holes and supermassive stars - under conditions of high radiation pressure. The variability in the luminosity of Cyg X-1 and galactic nuclei is considered in these models. The presence of convection and turbulence generates acoustic waves whose spectrum upon propagation into transparent layers is determined by the conditions of transmission and damping. Variability of the radiation is associated with fluctuations in the temperature of the photosphere and the corona due to variable heating. The characteristic times of variability agree well with the observations for all objects, but for supermassive stars it is difficult to obtain a sufficient amplitude in the light fluctuations.
Bisnovatyi-Kogan Gennadi S.
Blinnikov Sergei I.
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