The Physical Parameters of V680 Mon—Eclipsing Star with the Highest Known Eccentricity

Volkov, I.M.; Kravtsova, A.S.; Chochol, D.

Авторы: Volkov I.M., Kravtsova A.S., Chochol D.
Журнал: Astronomy Reports
Том: 65
Номер: 3
Год издания: 2021
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 184
Последняя страница: 202
DOI: 10.1134/S1063772921020062
Аннотация: We present the first high accuracy UBVRI(RI)c CCD light curves of the poorly investigated eclipsing system V680 Mon = GSC 7428 218 (P = 8.54d, V = 10.02m). They were used to find the photometric solutions and to derive the physical characteristics of the components. The highest known eccentricity e = 0.613 was found in the class of systems with eccentric orbits. The orientation of the orbital ellipse ω = 357° is not convenient for apsidal motion investigation. High accuracy of our bservations allows to find the reliable parameters of the system: M1 = 3.3 (B7 V), M2 = 1.8 (A2 V). We estimate the age of the componentsto be 70 mln.years. The photometric parallax pi = 0.00109(1)″, derived from our observations, is two times smaller than the value pi = 0.0025(9)″ from GAIA DR1, affected by the presence of the K3 V optical companion of the investigated star. The light curves solution demonstrates the presence of a third light, which can be assigned to a star of A4 V spectral class. The light time effect is found in the minima timings, so the source ofthe third light is physically connected to the eclipsing system. The parameters of the third body orbit are derived.
Добавил в систему: Волков Игорь Михайлович

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