Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991azh....68..652z&link_type=abstract
Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 68, May-June 1991, p. 652-656. In Russian.
Astronomy and Astrophysics
Astronomy
Accretion Disks, Active Galactic Nuclei, Astronomical Spectroscopy, Black Holes (Astronomy), Emission Spectra, Astronomical Models, Gravitational Fields, Line Spectra, Quasars
Scientific paper
The present study proves the hypothesis that the formation of emission clouds radiating the permitted lines in the spectra of active galaxies takes place in the outer parts of an accretion disk around a massive black hole. These parts of the disk become self-gravitating and may disintegrate into fragments. The nonlinear effects in the disk must provoke the slow drift of clouds in a direction perpendicular to the disk plane, and the radiation force stimulates the cloud motion along the untwisting spiral away from the nucleus.
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