Non-LTE models of H-alpha emission from accretion disks in nondegenerate eclipsing binaries

Details Non-LTE models of H-alpha emission from accretion disks in nondegenerate eclipsing binaries Non-LTE models of H-alpha emission from accretion disks in nondegenerate eclipsing binaries

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....102.1423o&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 102, Oct. 1991, p. 1423-1427. Research supported by NSF.

Astronomy and Astrophysics

Astronomy

16

Accretion Disks, Eclipsing Binary Stars, H Alpha Line, Stellar Models, Degenerate Matter, Local Thermodynamic Equilibrium, Stellar Rotation

Scientific paper

Evidence is summarized for the existence of rotating accretion disks in some long-period nondegenerate eclipsing binary systems. These disks are optically thin in all continua except the Lyman. An accretion-disk model which predicts the emission-line profile of H-alpha, including approximations for departures from local thermodynamic equilibrium, is described. Effects of pressure and kinetic temperature variations, departures from Keplerian rotation, disk partial eclipses by the cool star, and microturbulence on emitted profiles are briefly discussed.

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