Abstract
We consider a passage of the stars through the accretion disk near the supermassive black hole in the nuclei of active galaxies and quasars. When a star penetrates the disk, a hydrodynamical track is formed behind it. The boundary of the track is a cylindric shock-wave. The region of the track is optically thick with respect to the true absorption. The transfer of the energy dissipated by the passage of the star with a radius ≈1012 cm (the typical dimensions of a star in a galactic nucleus) across the disk provided by the radiative heat conduction. Each star passage through the intermediate region of the disk results in the appearance of a bright spot on its surface. The energy emitted by the spots lies inside the frequency range from visible to UV, exceeding the disk luminosity due to accretion in the range considered.
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Zentosova, A.S. The interaction of the stars with accretion disk around the massive black hole in the nuclei of active galaxies and quasars. Astrophys Space Sci 95, 11–19 (1983). https://doi.org/10.1007/BF00661152
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DOI: https://doi.org/10.1007/BF00661152