The Nature of the Eccentric Double-lined Eclipsing Binary System KIC 2306740 with Kepler Space Photometry
| Autor: | Kadri Yakut, T. İçli, Dilara Koçak, Christopher A. Tout, Peter P. Eggleton, John Southworth, Steven Bloemen |
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| Přispěvatelé: | Tout, Christopher [0000-0002-1556-9449], Apollo - University of Cambridge Repository |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Astrophysics::High Energy Astrophysical Phenomena Astronomy FOS: Physical sciences Astronomy and Astrophysics 5109 Space Sciences Astrophysics::Cosmology and Extragalactic Astrophysics Q1 Space (mathematics) Kepler Photometry (astronomy) Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Binary star Astrophysics::Solar and Stellar Astrophysics Binary system Astrophysics::Earth and Planetary Astrophysics Space Science 51 Physical Sciences QC Astrophysics::Galaxy Astrophysics Solar and Stellar Astrophysics (astro-ph.SR) QB |
| Zdroj: | The Astrophysical Journal, 910, 2, pp. 1-7 The Astrophysical Journal, 910, 1-7 |
| ISSN: | 0004-637X |
| Popis: | We present a detailed study of KIC 2306740, an eccentric double-lined eclipsing binary system. Kepler satellite data were combined with spectroscopic data obtained with the 4.2 m William Herschel Telescope (WHT). This allowed us to determine precise orbital and physical parameters of this relatively long period (P = 10(d).3) and slightly eccentric (e = 0.3) binary system. The physical parameters have been determined to be M-1 = 1.194 +/- 0.008 M-circle dot, M-2 = 1.078 +/- 0.007 M-circle dot, R-1 = 1.682 +/- 0.004 R-circle dot, R-2 = 1.226 +/- 0.005 R-circle dot, L-1 = 2.8 +/- 0.4 L-circle dot, L-2 = 1.8 +/- 0.2 L-circle dot, and orbital separation a = 26.20 +/- 0.04 R-circle dot through simultaneous solutions of the Kepler light curves and WHT radial velocity data. Binarity effects were extracted from the light curve in order to study intrinsic variations in the residuals. Five significant and more than 100 combination frequencies were detected. We modeled the binary system assuming nonconservative evolution models with the Cambridge STARS (TWIN) code, and we show the evolutionary tracks of the components in the log L-logT plane, the log R-log M plane, and the log P-age plane for both spin and orbital periods together with eccentricity e and log R-1. The model of the nonconservative processes in the code led the system to evolve to the observed system parameters in roughly 5.1 Gyr. Turkish Scientific and Research Council [TUBITAK 117F188]; TUBITAK-BIDEB 2211-C scholarship; TUBITAK-BIDEB 2214-A scholarship; Churchill College; COST (European Cooperation in Science and Technology) Action [CA15117, CA16104] We are very grateful to an anonymous referee for comments and helpful, constructive suggestions, which helped us to improve the paper. The authors gratefully acknowledge the numerous people who have helped the NASA Kepler mission possible. This study was supported by the Turkish Scientific and Research Council (TUBITAK 117F188). D.K. is grateful to the Astronomy Department of the University of Geneva (Geneva Observatory) for the kind hospitality during her visit and gratefully acknowledges the support provided by the TUBITAK-BIDEB 2211-C and 2214-A scholarships. C.A.T. thanks Churchill College for his fellowship. K.Y. and D.K. would like to acknowledge the contribution of COST (European Cooperation in Science and Technology) Action CA15117 and CA16104. |
| Databáze: | OpenAIRE |
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