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Astron. Astrophys. 331, 550-556 (1998)

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H variability of the B-type binary Aurigae

Tomá Raja and Marek Wolf

Astronomical Institute, Charles University Prague, CZ-180 00 Praha 8, Czech Republic (e-mail: wolf@mbox.cesnet.cz)

Received 23 December 1996 / Accepted 7 October 1997


We report several new radial velocities of the early-type spectroscopic binary [FORMULA] Aur derived from photographic and RETICON spectrograms. Improved orbital elements are computed and a new orbital period P [FORMULA] 676 days of this system is derived. The secondary component lines are invisible in the spectrum of the system with the supergiant primary. Spectral type of the secondary component is discussed.

The description of the spectrum [FORMULA]  Aur in the wavelength range from 6300 to 6700 Å is presented. H[FORMULA] emission and its variability was discovered and H[FORMULA] profile behaviour is described and analyzed.

Key words: binaries: spectroscopic – stars: individual: O Aur – supergiants

Send offprint requests to: M. Wolf

© European Southern Observatory (ESO) 1998

Online publication: February 16, 1998