The population of close binary hot subdwarfs studied with light curves from space telescopes

热亚矮星(SDO/B)是红巨星的剥离核心，很可能是通过双星相互作用形成的。近双星亚矮星在由日食、反射效应、SDB主星的椭球形变或极浅的相对论多普勒增强引起的光曲线上表现出特征特征。然而，地面光曲线测量只对百分比水平的变化敏感，不允许我们研究近距离热亚矮星双星的全部种群。在这里，我们申请一个博士后职位，对TESS任务从太空获得的所有3200SDO/B光曲线以及盖亚任务获得的40000条光曲线进行分析。双星签名的分类将允许我们对SDO/B星的紧密双星性质施加有意义的限制。此外，我们将结合对大约30个日食和椭球变星SDB+WD双星的TESS光曲线和文献中的光谱参数的分析来确定它们的基本参数。

Hot subdwarf stars (sdO/Bs) are the stripped cores of red-giant stars and are most likely formed via binary interactions. Close-binary subdwarfs show characteristic signatures in their light curves caused by eclipses, the reflection effect, the ellipsoidal deformation of the sdB primary or the very shallow relativistic Doppler boosting. However, ground-based light curve surveys are only sensitive to variations at the percent level and do not allow us to study the full population of close hot subdwarf binaries. Here we apply for a PostDoc postion to perform an analysis of all the 3200 sdO/B light curves obtained from space by the TESS mission as well as the 40000 light curves obtained by the Gaia mission. The classification of binary signatures will allow us to put meaningful constraints on the close binary properties of sdO/B stars. Furthermore, we will combine an analysis of the TESS light curves with spectroscopic parameters from literature for about 30 eclipsing and ellipsoidal variable sdB+WD binaries to determine their fundamental parameters.