论文标题
重新讨论黯然失色的二进制文件。纸十三。 F型双系统ZZBoötis
Rediscussion of eclipsing binaries. Paper XII. The F-type twin system ZZ Boötis
论文作者
论文摘要
ZZ Boo是一种F型脱落的二元系统，在圆形轨道上包含两个几乎相同的恒星，周期为4.992 d。我们分析了来自两个观测的扇区的光曲线，这些观测值具有传播系外星球调查卫星（TESS）和两个发表的组件恒星的径向速度集，以确定其物理性能高精度。我们发现1.558 +/- 0.008 MSUN和1.599 +/- 0.012 MSUN的质量和2.063 +/- 0.006 RSUN和2.205 +/- 0.006 RSUN的质量。过去和次要的日食深度的相似性在过去导致了混乱。苔丝数据的高质量意味着我们第一次可以清楚地确定哪个是哪个。初级恒星比次要恒星最终更热，但较小且较小。我们定义了新的高精度轨道胚层，并使用系统的Gaia视差获得有效的温度。次级恒星比初级恒星进化得多，并且与太阳化学组成和1.7 GYR的理论预测达成了良好的一致性。
ZZ Boo is an F-type detached eclipsing binary system containing two almost-identical stars on a circular orbit with a period of 4.992 d. We analyse light curves from two sectors of observations with the Transiting Exoplanet Survey Satellite (TESS) and two published sets of radial velocities of the component stars to determine their physical properties to high precision. We find masses of 1.558 +/- 0.008 Msun and 1.599 +/- 0.012 Msun, and radii of 2.063 +/- 0.006 Rsun and 2.205 +/- 0.006 Rsun. The similarity in the primary and secondary eclipse depths has led to confusion in the past. The high quality of the TESS data means we can, for the first time, clearly identify which is which. The primary star is conclusively hotter but smaller and less massive than the secondary star. We define a new high-precision orbital ephemeris and obtain effective temperatures using the Gaia parallax of the system. The secondary star is more evolved than the primary and a good agreement with theoretical predictions is found for a solar chemical composition and an age of 1.7 Gyr.
