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arXiv 1603.03005astro-ph.SR
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开普勒双星的基本参数I. KIC 5738698

Fundamental Parameters of Kepler Eclipsing Binaries. I. KIC 5738698

Rachel A. Matson, Douglas R. Gies, Zhao Guo, Jerome A. Orosz

摘要:

恒星双星是恒星质量和半径的宝贵来源,可以为恒星演化模型提供信息,并提供对其他天体物理过程的见解。开普勒等太空任务产生的精致光变曲线提供了迄今为止最严格的测试。我们利用4.8天食双星KIC 5739896的开普勒光变曲线和地基光谱,导出了该系统的基本参数。我们重建的成分光谱,以确定个人的大气参数,和模型的开普勒测光与二进制合成代码ELC,以获得准确的质量和半径。KIC 5738698的两颗恒星都是F型恒星,M1 = 1.39+/-0.04M,M2 = 1.34+/-0.06M,R1 = 1.84+/-0.03R,R2 = 1.72+/-0.03R。我们还报告了一个小的偏心率(e < 0.0017)和不寻常的α值,需要匹配开普勒光变曲线的详细形状。进化模型的比较表明,该系统的年龄约为2.3 Gyr。

英文摘要:

Eclipsing binaries serve as a valuable source of stellar masses and radii that inform stellar evolutionary models and provide insight into additional astrophysical processes. The exquisite light curves generated by space-based missions such as Kepler offer the most stringent tests to date. We use the Kepler light curve of the 4.8-day eclipsing binary KIC 5739896 with ground based optical spectra to derive fundamental parameters for the system. We reconstruct the component spectra to determine the individual atmospheric parameters, and model the Kepler photometry with the binary synthesis code ELC to obtain accurate masses and radii. The two components of KIC 5738698 are F-type stars with M1 = 1.39+/-0.04M, M2 = 1.34+/-0.06M, and R1 = 1.84+/-0.03R, R2 = 1.72+/-0.03R. We also report a small eccentricity (e < 0.0017) and unusual albedo values that are required to match the detailed shape of the Kepler light curve. Comparisons with evolutionary models indicate an approximate age of 2.3 Gyr for the system.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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