论文标题
重新讨论黯然失色的二进制文件。论文III。干涉，光谱和黯然失色的二进制V1022 Cassiopeiae
Rediscussion of eclipsing binaries. Paper III. The interferometric, spectroscopic and eclipsing binary V1022 Cassiopeiae
论文作者
论文摘要
V1022 CAS被称为光谱二元。发现它是基于河马卫星的光度法黯然失色的，最近从近红外干涉法获得了星体轨道。我们根据苔丝卫星获得的光曲线对恒星半径进行了第一个高精度测量。结合来自高分辨率光谱的发表径向速度，我们测量恒星的质量为1.626 +/- 0.001 MSUN和1.609 +/- 0.001 MSUN，RADII为2.591 +/- 0.026 RSUN和2.472 RSUN和2.472 +/- 0.027 RSUN。 12.16-d轨道是偏心的，恒星旋转次同步，因此该系统是潮汐未发展的。与这些质量和半径以及恒星的发表温度相匹配，可在几组理论恒星进化模型中，用于太阳金属性，年龄约为2 Gyr。可以为系统提供四个独立的距离确定，并且非常同意。距离基于表面亮度校准，理论侧层校正，GAIA视差和天体轨道的角度大小。对系统测量化学丰度和更精确温度的系统进行详细的光谱分析将有所帮助。
V1022 Cas has been known as a spectroscopic binary for a century. It was found to be eclipsing based on photometry from the Hipparcos satellite, and an astrometric orbit was recently obtained from near-infrared interferometry. We present the first high-precision measurement of the radii of the stars based on light curves obtained by the TESS satellite. Combined with published radial velocities from high-resolution spectra, we measure the masses of the stars to be 1.626 +/- 0.001 Msun and 1.609 +/- 0.001 Msun, and the radii to be 2.591 +/- 0.026 Rsun and 2.472 +/- 0.027 Rsun. The 12.16-d orbit is eccentric and the stars rotate sub-synchronously, so the system is tidally unevolved. A good match to these masses and radii, and published temperatures of the stars, is found for several sets of theoretical stellar evolutionary models, for a solar metallicity and an age of approximately 2 Gyr. Four separate distance determinations to the system are available, and are in good agreement. The distances are based on surface brightness calibrations, theoretical bolometric corrections, the Gaia parallax, and the angular size of the astrometric orbit. A detailed spectroscopic analysis of the system to measure chemical abundances and more precise temperatures would be helpful.
