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Astron. Astrophys. 348, 843-845 (1999)

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Optical and infrared modulation in the Be-star/X-ray source LSI+61o303

Krishna M.V. Apparao

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

Received 20 October 1998 / Accepted 18 February 1999


The Be star X-ray source LSI+61o303 is found to show optical and infrared modulation with its orbital period. We show that this modulation is due to radiation from a shock produced by the companion to the Be star, while it passes through the gas envelope of the Be star in its binary motion.

Key words: stars: emission-line, Be – stars: individual: LSI+61O 303 – infrared: stars – X-rays: stars

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© European Southern Observatory (ESO) 1999

Online publication: August 13, 199