Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-07-23
Mon.Not.Roy.Astron.Soc. 315 (2000) 587
Astronomy and Astrophysics
Astrophysics
submitted to MNRAS, MN-latex, 8 pages with 6 PS figures
Scientific paper
10.1046/j.1365-8711.2000.03422.x
Radial velocity data for both components of W Crv are presented. In spite of providing full radial-velocity information, the new data are not sufficient to establish the configuration of this important system because of large seasonal light-curve variations which prevent a combined light-curve/radial-velocity solution. It is noted that the primary minimum is free of the photometric variations, a property which may help explain their elusive source. Photometrically, the system appears to be a contact binary with poor or absent energy exchange, but such an explanation - in view of the presence of the mass-transfer effects - is no more plausible than any one of the semi-detached configurations with either the more-massive or less-massive components filling their Roche lobes. Lengthening of the orbital period and the size of the less-massive component above its main-sequence value suggest that the system is the shortest-period (0.388 days) known Algol with non-degenerate components.
Lu Wenxian
Rucinski Slavek M.
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