Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.172..293l&link_type=abstract
Astrophysics and Space Science, Volume 172, Issue 2, pp.293-304
Astronomy and Astrophysics
Astrophysics
4
Scientific paper
This paper studies the properties of self-gravity of accretion discs around supermassive black holes. With integration on the thin disc configuration, this paper has calculated the radial and vertical components of self-gravity of accretion discs. The discussion mainly concentrates on the radial component, and the results are briefly as follows: ‘for accretion discs around supermassive black holes (M˜10 8 1010 M&sun;). At the distance where (R/R g)˜105 104, the radial component of self-gravity dominates over the central one where the dynamical structure of the accretion discs completely differs from that of Keplerian disc. A turbulence driven by radial self-gravity instability as a kind of energy source is proposed. This paper has two criteria for the comparison of magnitude between the self-gravity of accretion discs and the gravity of the central black hole, from which an analytic estimation for the outer radius of the accretion discs has been derived. The results of this paper may be used to explain the accretion discs of quasars and AGNs.
Lantian Yang
Xiaoci Liu
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