The dense stellar cluster - A possible source of gas in active galactic nuclei and quasars

Details The dense stellar cluster - A possible source of gas in active galactic nuclei and quasars The dense stellar cluster - A possible source of gas in active galactic nuclei and quasars

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988azh....65..682i&link_type=abstract

Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 65, July-Aug. 1988, p. 682-694. In Russian.

Astronomy and Astrophysics

Astronomy

4

Active Galactic Nuclei, Molecular Gases, Quasars, Star Clusters, Black Holes (Astronomy), Gravitational Fields, Inelastic Collisions, Seyfert Galaxies

Scientific paper

Dense stellar clusters are studied as a possible source of gas accreted onto the central black hole in AGNs and nearby QSOs. The tidal disruption of stars in the gravitational field of the black hole and the dirsuption of stars accounting for inelastic collisions are considered as mechanisms for gas production. A method is presented for determining the mass and radius parameters of the disrupted regions of stellar clusters in AGNs and QSOs using their luminosity values. It is shown that the stellar clusters in these objects must be 1-3 orders of magnitude more dense, and in the case of the brightest objects more massive than stellar nuclei in inactive galaxies. The mass and radius cluster parameters are calculated for Type 1 and Type 2 Seyfert galaxies and nearby QSOs. It is shown that in the case of QSOs and most Type 1 Seyfert galaxies, the main mechanism for disruption is the inelastic collision of stars. In the case of Type 2 Seyfert galaxies and Type 1 galaxies with luminosities less than about 10 to the 44th erg/s, disruption occurs by the tidal force of the central black hole.

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