Spectroscopic observations of Beta Lyrae II - The H-alpha profile

Details Spectroscopic observations of Beta Lyrae II - The H-alpha profile Spectroscopic observations of Beta Lyrae II - The H-alpha profile

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982pasp...94..341s&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 94, Apr. 1982, p. 341-344.

Astronomy and Astrophysics

Astronomy

2

B Stars, Eclipsing Binary Stars, Emission Spectra, H Alpha Line, Spectral Energy Distribution, Spectral Line Width, Stellar Spectrophotometry, Stellar Mass Accretion, Stellar Models, Stellar Rotation

Scientific paper

Image Isocon observations of the H-alpha profile of Beta Lyr indicate that: (1) the emission strength undergoes phase-correlated variations; (2) the nature of the correlation between emission strength and emission width in the hemisphere preceding the B8 star is different from that in the hemisphere following it; and (3) the orbital V/R variations in 1974-75 are different from those in 1971. A model of the system containing an accretion disk, a hot region between the two stars, a gas stream flowing from the B8 star to the unseen companion in the hemisphere following the unseen companion, and a rotating shell-velocity-ellipse qualitatively explains the observations.

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