Apsidal motion in southern eccentric eclipsing binaries: YY Sgr, V523 Sgr, V1647 Sgr, V2283 Sgr and V760 Sco
نویسنده
چکیده
Several new times of minimum light recorded with photoelectric means have been gathered for the early-type eccentric eclipsing binaries YY Sgr (P = 2. d63, e = 0.16), V523 Sgr (2. d32, 0.16), V1647 Sgr (3. d28, 0.41), V2283 Sgr (3. d47, 0.49) and V760 Sco (1. d73, 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 k2 are derived and compared to their theoretical values.
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