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Astron. Astrophys. 356, 134-140 (2000)

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Apsidal motion in southern eccentric eclipsing binaries: YY Sgr, V523 Sgr, V1647 Sgr, V2283 Sgr and V760 Sco *

M. Wolf

Astronomical Institute, Charles University Prague, 180 00 Praha 8, V Holeovikách 2, Czech Republic (wolf@mbox.cesnet.cz)

Received 16 November 1999 / Accepted 4 February 2000


Several new times of minimum light recorded with photoelectric means have been gathered for the early-type eccentric eclipsing binaries YY Sgr ([FORMULA]), V523 Sgr ([FORMULA]), V1647 Sgr ([FORMULA]), V2283 Sgr ([FORMULA]) and V760 Sco ([FORMULA]). The [FORMULA] diagrams are analyzed using all reliable timings found in the literature and improved values for the elements of the apsidal motion are computed. We find more precise periods of apsidal motion of about 290, 202, 531, 528 and 38.5 years for YY Sgr, V523 Sgr V1647 Sgr, V2283 Sgr and V760 Sco, respectively. The corresponding internal structure constants log [FORMULA] are derived and compared to their theoretical values.

Key words: stars: binaries: eclipsing – stars: fundamental parameters – stars: general

* Based on observations collected at the South Africa Astronomical Observatory, Sutherland, South Africa

© European Southern Observatory (ESO) 2000

Online publication: March 28, 2000