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arXiv 1909.09161astro-ph.SR
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用CHARA阵列观测光谱双星的可见轨道。II。食双星HD 185912

Visual Orbits of Spectroscopic Binaries with the CHARA Array. II. The eclipsing binary HD 185912

Kathryn V. Lester, Douglas R. Gies, Gail H. Schaefer, Christopher D. Farrington, Zhao Guo, Rachel A. Matson, John D. Monnier, Theo ten Brummelaar, Judit Sturman… 展开作者

Kathryn V. Lester, Douglas R. Gies, Gail H. Schaefer, Christopher D. Farrington, Zhao Guo, Rachel A. Matson, John D. Monnier, Theo ten Brummelaar, Judit Sturmann, Norman Vargas, Samuel A. Weiss

摘要:

我们提出了双线食双星,HD 185912,从长基线干涉与CHARA阵列的视觉轨道。我们还获得了阿帕奇点天文台的阶梯光谱,以更新光谱轨道解,并分析了Burggraaff等人的新测光模型。通过结合光谱和视觉轨道解,我们发现M1 = 1.361 +/- 0.004 Msun和M2 = 1.331 +/- 0.004 Msun,距离轨道视差d = 40.75 +/- 0.30 pc。从光变曲线解,我们发现R1 = 1.348 +/- 0.016 Rsun和R2 = 1.322 +/- 0.016 Rsun的分量半径。通过比较这些观测参数与恒星演化模型,我们发现HD 185912是一个年轻的系统附近的零年龄的主要序列,估计年龄为5亿年。

英文摘要:

We present the visual orbit of the double-lined eclipsing binary, HD 185912, from long baseline interferometry with the CHARA Array. We also obtain echelle spectra from the Apache Point observatory to update the spectroscopic orbital solution and analyze new photometry from Burggraaff et al. to model the eclipses. By combining the spectroscopic and visual orbital solutions, we find component masses of M1 = 1.361 +/- 0.004 Msun and M2 = 1.331 +/- 0.004 Msun, and a distance of d = 40.75 +/- 0.30 pc from orbital parallax. From the light curve solution, we find component radii of R1 = 1.348 +/- 0.016 Rsun and R2 = 1.322 +/- 0.016 Rsun. By comparing these observed parameters to stellar evolution models, we find that HD 185912 is a young system near the zero age main sequence with an estimated age of 500 Myr.

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