Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...356..134w&link_type=abstract
Astronomy and Astrophysics, v.356, p.134-140 (2000)
Astronomy and Astrophysics
Astrophysics
13
Stars: Binaries: Eclipsing, Stars: Fundamental Parameters, Stars: General
Scientific paper
Several new times of minimum light recorded with photoelectric means have been gathered for the early-type eccentric eclipsing binaries YY Sgr (P = 2fd 63, e = 0.16), V523 Sgr (2fd 32, 0.16), V1647 Sgr (3fd 28, 0.41), V2283 Sgr (3fd 47, 0.49) and V760 Sco (1fd 73, 0.03). The O - C 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 k_2 are derived and compared to their theoretical values. Based on observations collected at the South Africa Astronomical Observatory, Sutherland, South Africa
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