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Astron. Astrophys. 337, 721-722 (1998)


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Research Note

Orbital period-H[FORMULA] correlation in Be star/X-ray binaries?

Krishna M.V. Apparao

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

Received 29 August 1997 / Accepted 20 April 1998

Abstract

Reig, Fabregat & Coe (1997) plotted the equivalent width of H[FORMULA] emission against the orbital period for several Be star/X-ray binary systems, and find a correlation. If instead of the equivalent width, which is a relative quantity, the luminosity of H[FORMULA] emission, which is an absolute quantity, is used the correlation is not found.

Key words: stars: emission-line, Be – X-rays: stars


© European Southern Observatory (ESO) 1998

Online publication: August 27, 1998

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