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Title:
Vertical structure of accretion disks - A simplified analytical model
Authors:
Hubeny, I.
Affiliation:
AA(High Altitude Observatory, Boulder, CO; California, University, Los Angeles)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 351, March 10, 1990, p. 632-641. Research supported by NASA. (ApJ Homepage)
Publication Date:
03/1990
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Accretion Disks, Astronomical Models, Gray Gas, Stellar Atmospheres, Stellar Mass Accretion, Hydrostatics, Irradiation, Optical Thickness, Thermodynamic Equilibrium, Vertical Distribution, Viscous Damping
DOI:
10.1086/168501
Bibliographic Code:
1990ApJ...351..632H

Abstract

A simplified model of the vertical structure of accretion disks is derived. Analytical expressions for the temperature and density structure, which represent a generalization of the gray model long known in the theory of classical stellar atmospheres, are presented. The formalism naturally explains similarities and differences between the structure of a disk and a stellar atmosphere. In particular, the influence of viscous dissipation and external irradiation of the disk by the central star, as well as of the finite optical thickness of the disk, may be easily accounted for and explained by the present model.

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