EDP Sciences
Free access
Volume 371, Number 2, May IV 2001
Page(s) 672 - 674
Section Formation, structure and evolution of stars
DOI http://dx.doi.org/10.1051/0004-6361:20010437

A&A 371, 672-674 (2001)
DOI: 10.1051/0004-6361:20010437

Research Note

The 1584 day period in the Be Star LSI +61 $\mathsf{\degr} $303

K. M. V. Apparao

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

(Received 15 December 2000 / Accepted 12 March 2001 )

The Be star LSI +61$\degr $303 shows the 1584 d period in its X-ray emission. The difference in the 1584 d period phases of the peak X-ray and radio emissions and the H$\alpha$ emission is explained as being due to the time taken by the density enhancement, emitted by the Be star, and which is responsible for the increased emissions, to reach the periastron of the orbit of the binary companion.

Key words: X-ray: binaries -- stars: binaries: general stars: LSI +61$\degr $303 -- stars: emission libre: Be

Offprint request: K. M. V. Apparao, aprao@tifr.res.in

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