Absolute dimensions and apsidal motion of the eccentric binary V731 Cephei
dc.authorid | Bilir, Selcuk/0000-0003-3510-1509 | |
dc.authorid | Slechta, Miroslav/0000-0002-6819-2331 | |
dc.authorid | Lee, Jae W/0000-0002-8756-0195 | |
dc.authorid | BAKIS, VOLKAN/0000-0002-3125-9010 | |
dc.contributor.author | Bakis, V. | |
dc.contributor.author | Zejda, M. | |
dc.contributor.author | Bulut, I. | |
dc.contributor.author | Wolf, M. | |
dc.contributor.author | Bilir, S. | |
dc.contributor.author | Bakis, H. | |
dc.contributor.author | Demircan, O. | |
dc.date.accessioned | 2025-01-27T20:27:04Z | |
dc.date.available | 2025-01-27T20:27:04Z | |
dc.date.issued | 2008 | |
dc.department | Çanakkale Onsekiz Mart Üniversitesi | |
dc.description.abstract | A detailed analysis of new and existing photometric, spectroscopic and spatial distribution data of the eccentric binary V731 Cep was performed. Spectroscopic orbital elements of the system were obtained by means of cross-correlation technique. According to the solution of radial velocities with UBVRc and I-c light curves, V731 Cep consists of two main-sequence stars with masses M-1 = 2.577 (0.098) M-circle dot, M-2 = 2.017 (0.084) M-circle dot, radii R-1 = 1.823 (0.030) R-circle dot, R-2 = 1.717 (0.025) R-circle dot and temperatures T-eff1 = 10700 (200) K, T-eff2 = 9265 (220) K separated from each other by a = 23.27 (0.29) R-circle dot in an orbit with inclination of 88 degrees.70 (0.03). Analysis of the O-C residuals yielded a rather long apsidal motion period of U = 10000 (2500) yr compared to the observational history of the system. The relativistic contribution to the observed rates of apsidal motion for V731 Cep is significant (76 per cent). The combination of the absolute dimensions and the apsidal motion properties of the system yielded consistent observed internal structure parameter (log (k) over bar (2,obs) = -2.36) compared to the theory ( log (k) over bar (2,theo) = -2.32). Evolutionary investigation of the binary by two methods (Bayesian and evolutionary tracks) shows that the system is t = 133(26) Myr old and has a metallicity of [M/H] = -0.04(0.02) dex. The similarities in the spatial distribution and evolutionary properties of V731 Cep with the nearby (rho similar to 3 degrees.9) open cluster NGC 7762 suggest that V731 Cep could have been evaporated from NGC 7762. | |
dc.description.sponsorship | COMU Scientific Research Foundation [BAP2008/37]; Ministry of Education of Czech Republic [MSM0021620860]; Czech Science Foundation [GA CR 205/06/0217] | |
dc.description.sponsorship | The authors would like to thank Dr Antonio Cabrera-Lavers for his help in extracting extinction data from RC stars and to the referee, Professor E. F. Guinan, for his useful comments that improved the readability of this paper. This study is part of a project funded by COMU Scientific Research Foundation under project code BAP2008/37. The research of MW was supported by the Research Programme MSM0021620860 of the Ministry of Education of Czech Republic. Participation of MZ in this study was endorsed by the grant GA CR 205/06/0217 of the Czech Science Foundation. | |
dc.identifier.doi | 10.1111/j.1365-2966.2008.13757.x | |
dc.identifier.endpage | 407 | |
dc.identifier.issn | 0035-8711 | |
dc.identifier.issn | 1365-2966 | |
dc.identifier.issue | 1 | |
dc.identifier.scopus | 2-s2.0-52949087515 | |
dc.identifier.scopusquality | Q1 | |
dc.identifier.startpage | 399 | |
dc.identifier.uri | https://doi.org/10.1111/j.1365-2966.2008.13757.x | |
dc.identifier.uri | https://hdl.handle.net/20.500.12428/22569 | |
dc.identifier.volume | 390 | |
dc.identifier.wos | WOS:000260528800056 | |
dc.identifier.wosquality | Q1 | |
dc.indekslendigikaynak | Web of Science | |
dc.indekslendigikaynak | Scopus | |
dc.language.iso | en | |
dc.publisher | Oxford Univ Press | |
dc.relation.ispartof | Monthly Notices of The Royal Astronomical Society | |
dc.relation.publicationcategory | info:eu-repo/semantics/openAccess | |
dc.rights | info:eu-repo/semantics/openAccess | |
dc.snmz | KA_WoS_20250125 | |
dc.subject | binaries: eclipsing | |
dc.subject | stars: early-type | |
dc.subject | stars: evolution | |
dc.subject | stars: fundamental parameters | |
dc.subject | stars: individual: V731 Cephei | |
dc.title | Absolute dimensions and apsidal motion of the eccentric binary V731 Cephei | |
dc.type | Article |