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1995A&A...299...79Z - Astronomy and Astrophysics, volume 29979-83 (1995/7-1)
The rotation period of HD77581 (Vela X-1).
ZUIDERWIJK E.J.
Abstract (from CDS):
The rotation period of HD77581, supergiant primary in the X-ray binary Vela X-1, is determined from an analysis of selected absorption line profiles. The rotation rate determined from HeI line profiles is 0.67±0.04 times that of the binary angular velocity, corresponding to a rotation velocity veqsini=116±6km/s and a rotation period of about 13.5days.
Abstract Copyright: ∼
Journal keyword(s): close binaries - stars: individual: HD 77581 - stars: rotation - supergiants
Simbad objects: 1
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