The disk-star boundary layer and its effect on the accretion disk structure

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Accretion Disks, Binary Stars, Stellar Mass Accretion, Variable Stars, White Dwarf Stars, Asymptotic Methods, Mathematical Models, Stellar Models, X Rays

Scientific paper

A method of matched asymptotic expansions is developed for the self-consistent calculation of an accretion disk and the disk-accreting star boundary layer. This method is employed to calculate a model of a thin, optically thick, region (c) accretion disk and boundary layer around a white dwarf. It is shown that the disk in this model is hotter and denser than in the model proposed by Shakura and Sunyaev (1973). The implications of the solution of this model are examined and the use of the method for other boundary-layer physical conditions is proposed.

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