Astronomy and Astrophysics – Astronomy
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ppcn.conf..161s&link_type=abstract
In ESA, Fourth International Toki Conference on Plasma Physics and Controlled Nuclear Fusion p 161-164 (SEE N94-22624 05-75)
Astronomy and Astrophysics
Astronomy
Accretion Disks, Active Galactic Nuclei, X Ray Spectra, Black Holes (Astronomy), Disk Galaxies, Extraterrestrial Radiation, Radiation Pressure, Radiative Heat Transfer
Scientific paper
Observationally, some active galactic nuclei show soft x-ray excess which suggests that spectrum deviates from black body. Attempts in calculating the emission spectrum for optically thick disk were made. Most investigations to date were made by adopting the given vertical structure which is obtained by assuming that radiation pressure dominates over gas pressure. However, this seems to be inadequate, because the effect of gas pressure is expected to be significant in determining the vertical structure near the surface where emission spectrum is formed. A detailed calculation, where radiative transfer and vertical structure are self-consistently solved, is performed.
Shimura Toshiya
Takahara Fumio
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