Triple Eccentric Systems V0345 Lac, YY Sgr, and DR Vul
| Authors | |
|---|---|
| Year of publication | 2019 |
| Type | Article in Periodical |
| Magazine / Source | Acta astronomica |
| MU Faculty or unit | |
| Citation | |
| Web | https://ui.adsabs.harvard.edu/abs/2019AcA....69...63W/abstract |
| Doi | http://dx.doi.org/10.32023/0001-5237/69.1.5 |
| Keywords | binaries: eclipsing; Stars: fundamental parameters; Stars: individual: V0345 Lac; YY Sgr;and DR Vul |
| Description | We present more results of our long-term observational project to analyze the variations of the orbital period for early-type eccentric eclipsing binaries. About sixty new precise mid-eclipse times were measured or derived for three eclipsing binaries, namely V0345 Lac, YY Sgr, and DR Vul. Based on current O - C diagrams, we found in all cases that beside the typical apsidal motion the times of minima show additional cyclical changes likely caused by a third body orbiting the eclipsing pair. The new light curve solution of V0345 Lac results in a moderate orbital eccentricity (e = 0.26) of this binary. The periods of apsidal motion are 1580 yr, 295 yr, and 36 yr, respectively. The relativistic contributions to the total apsidal-motion rate are small for all three eccentric binaries - about 5-14%. The third-body orbital periods are relatively short: 24 yr, 19 yr and 66 yr, and the minimal masses of third bodies are: 2.0 M-circle dot, 0.8 M-circle dot, and 7.2 M-circle dot, respectively. |
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