Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977mnras.180...45p&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 180, July 1977, p. 45-56. Research supported by the Science Research Co
Astronomy and Astrophysics
Astronomy
16
Astronomical Models, Evaporation, Galactic Structure, Stellar Mass Accretion, X Ray Sources, Angular Momentum, Disks (Shapes), Energy Sources, Luminous Intensity, Thermal Stability, Wind Effects
Scientific paper
The effects of a secondary wind escaping from an accretion disk are discussed. It is shown that, contrary to the present belief, the radial disk equations are coupled to the vertical-structure equations via the wind generation mechanism. Generally the production of a secondary wind reduces the total luminosity and softens the resulting spectrum. The secondary wind cools the disk and can quench the thermal instability of the inner disk region. Hence, it may serve as a stabilizing mechanism for many unstable disk models. A detailed model for an evaporative wind is presented and applied to the two-temperature disk model. The resulting matter escaping in the secondary wind is about 25% of the accretion rate. The total luminosity is reduced by 25% and the high-energy component is reduced by 40% as compared with the nonevaporating values.
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