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Astron. Astrophys. 356, 972-974 (2000)

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H[FORMULA] line variations in the Be star binary LSI+61o303

K.M.V. Apparao

University of Bombay, Department of Physics, Bombay 400098, India

Received 3 December 1999 / Accepted 1 March 2000


The Be star LSI +61o303 shows an orbital variation in the ratio of the equivalent width of the blue wing to that of the red wing of the H[FORMULA] line profile. This variation is shown to be due to the obscuration caused by the post shock gas of a shock produced by the supersonic orbital motion of the secondary through the gas disk of the Be star.

Key words: stars: binaries: general – stars: emission-line, Be – stars: individual: LSI+61O 303

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© European Southern Observatory (ESO) 2000

Online publication: April 17, 2000