On the inner boundary condition of thin Keplerian accretion disks

Details On the inner boundary condition of thin Keplerian accretion disks On the inner boundary condition of thin Keplerian accretion disks

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...241..153d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 241, no. 1, Jan. 1991, p. 153-158.

Astronomy and Astrophysics

Astrophysics

25

Accretion Disks, Boundary Conditions, T Tauri Stars, Spectral Energy Distribution, Stellar Mass Accretion, Stellar Temperature

Scientific paper

The inner boundary condition in the standard astrophysical model (Shakura, 1972; Lynden-Bell and Pringle, 1974) of a geometrically thin Keplerian accretion disk around a stellar object is investigated analytically. The theoretical basis of the standard formulation is reviewed, and a generalized boundary condition is proposed which allows for radial energy transport between disk and boundary layer and requires only that the total energy in the accretion process (the disk and boundary-layer luminosity) be radiated in the system. Numerical results are presented in graphs, and it is found that predictions based on the new boundary condition give boundary layers which generally have lower temperatures and are less luminous than the disks.

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