论文标题
确定哪种二进制组件托有苔丝过渡行星
Determining Which Binary Component Hosts the TESS Transiting Planet
论文作者
论文摘要
NASA TESS任务已经发现了许多绕着附近明亮恒星绕的透明行星，高分辨率成像研究表明，许多这些系外行星宿主位于二进制或多个恒星系统中。在这样的系统中，单独的过境观测结果无法确定二进制系统中哪个恒星实际托管轨道行星。对于确定行星的准确物理特性，尤其是其真实半径和平均散装密度，恒星轨道的恒星知识是必要的。我们使用光曲线传输形状和Speckle Imaging的二进制通量比来得出23个二进制系统组件的平均恒星密度，然后测试了与恒星模型的一致性，以确定哪个组件是宿主星。我们发现，样品轨道中的苔丝过渡行星中有70％是主要恒星。
The NASA TESS mission has discovered many transiting planets orbiting bright nearby stars, and high-resolution imaging studies have revealed that a number of these exoplanet hosts reside in binary or multiple star systems. In such systems, transit observations alone cannot determine which star in the binary system actually hosts the orbiting planet. The knowledge of which star the planet orbits is necessary for determining accurate physical properties for the planet, especially its true radius and mean bulk density. We derived the mean stellar densities for the components of 23 binary systems using the light curve transit shape and the binary flux ratio from speckle imaging, then tested the consistency with stellar models to determine which component is the host star. We found that 70% of the TESS transiting planets in our sample orbit the primary star.
