CAOSP abstracts, Volume: 49, No.: 2, year: 2019

Author(s): Volkov, I.M.; Bagaev, L.A.; Kravtsova, A.S.; Chochol, D.
Journal: Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 49, no. 2, p. 434-438.
Date: 5/2019
Title: V839 Cep - a new massive eclipsing variable with apsidal motion in the field of Trumpler 37
Keyword(s): stars: binaries: eclipsing, stars: binaries: close, stars: interstellar reddening, stars: fundamental parameters
Pages: 434 -- 438
License: This work is licensed under a Creative Commons Attribution 4.0 International License

Abstract: Our precise UBV photometric light curves of a poorly studied Algol-type eclipsing binary V839 Cep were used to derive relative and absolute parameters of the system. The masses of the components 3.3± 0.2 M_☉, 4.4±0.3 M_☉, radii 1.9± 0.1 R_☉, 2.9±0.1 R_☉, effective temperatures 14 150±(300) K, 15 700±(300) K and inclination of the orbit 88.15± 0.02 deg were determined. The Eclipse Time Variation (ETV) diagram revealed the apsidal motion in the system with dω_obs/dt = 0.027(9)deg yr^-1, U = 13600(4500) years.

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