Photometric and period analysis of the eclipsing binary system V2783 Ori

Year, pages: 2021, 163 - 174

In this study we performed the first detailed photometric and period analysis of the recently discovered eclipsing binary star V2783 Ori. The analysis of thelight curve has shown that the system is in a detached configuration, withthe orbital eccentricity e = 0.274 ± 0.008. Thephotometric mass ratio of V2783 Ori determined from the light curve analysisis q = 0.734 ± 0.015. The absolute parameters ofthe system were obtained as a result of the light curve solution. Absoluteparameters were found as follows: masses M₁ = 1.80 ± 0.01 M_☉, M₂ = 1.32 ± 0.01 M_☉, radii R₁ = 2.19 ± 0.10 R_☉, R₂ = 1.91 ± 0.10 R_☉, temperatures T₁ = 8325 ± 100 K and T₂ = 8300 ± 100 K. A comparison ofthese parameters with theoretical stellar models show that the secondarycomponent is located inside the main-sequence band and still close to ZAMS,while the primary component is located in the middle of ZAMS-TAMS limits. The distance of the system determined from the absolute parameters, d = 1064 ± 150 pc, takes into account the interstellarreddening. The (O--C) diagram was discussed considering allreliable minima times found in the literature and new values for theparameters of the apsidal motion and light-time effect were found. Theapsidal motion rate of V2783 Ori is dω/dt = 0.0063 ± 0.0017 deg cycle^-1, and it corresponds to an apsidalmotion period of U = 656 ± 103 yr. The third bodyorbital period is 10 ± 2 yr, its minimal mass is 0.82 ± 0.11 M_☉.

Bulut, İ., Bulut, A. 2021. Photometric and period analysis of the eclipsing binary system V2783 Ori. In Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 51, no.2, pp. 163-174. 1335-1842. DOI: https://doi.org/10.31577/caosp.2021.51.2.163

Bulut, İ., Bulut, A. (2021). Photometric and period analysis of the eclipsing binary system V2783 Ori. Contributions of the Astronomical Observatory Skalnaté Pleso, 51(2), 163-174. 1335-1842. DOI: https://doi.org/10.31577/caosp.2021.51.2.163

Publisher: Astronomical Institute, Slovak Academy of Sciences

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