Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.191..135t&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 191, Apr. 1980, p. 135-150. Research supported by the Science Research
Astronomy and Astrophysics
Astrophysics
33
Astrophysics, Energy Transfer, Stellar Mass Accretion, Convection, Gas Pressure, Optical Thickness, Radiation Pressure, Supermassive Stars, Viscosity
Scientific paper
A discussion is given of the possibility that energy transport by convection might be important in steady, optically thick accretion discs. It is shown that necessary criteria for the onset of convection can be found for all viscosity and opacity laws expressible as products of powers of density and temperature. Regions dominated by radiation pressure are almost certainly unstable to convection but convection is much less likely when gas pressure is dominant. Self-gravitating discs are also less liable to convection than those in which self-gravitation is unimportant. Instabilities other than convection are neglected in this discussion.
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