论文标题

盖亚(Gaia)寻找感兴趣的苔丝对象的恒星伴侣iii

Gaia Search for stellar Companions of TESS Objects of Interest III

论文作者

Mugrauer, M., Zander, J., Michel, K. -U.

论文摘要

使用ESA-GAIA任务中的Astro和光度计数据提出了我们对(社区)感兴趣的对象进行的(社区)苔丝对象的最新结果,以检测这些恒星的恒星伴侣并表征其特性。在2175个目标中,总共检测到了124个二进制和7个分层三星级系统,在我们的调查过程中对它们的多重性进行了研究,在我们的调查过程中,它们位于距离近500%的距离。检测到的伴侣和目标位于相同的距离,并共享一个共同的适当运动,如重力结合的恒星系统的组成部分所预期的,正如其精确的GAIA EDR3星形测量所证明的那样。同伴的质量在约0.09至2.5 $ m_ \ odot $之间,并且最常在0.15至0.8 $ m_ \ odot $之间找到。同伴展示了向大约50至9700AU的目标的预测分离,其频率是最高且恒定的,直至约500AU,而对于较大的投影分离,它的频率降低。除了主要M中间至早期K矮人之外,该调查中还检测到4个白矮人的同伴,其实际性质可以通过其光度特性来识别。

The latest results from our ongoing multiplicity study of (Community) TESS Objects of Interest are presented, using astro- and photometric data from the ESA-Gaia mission, to detect stellar companions of these stars and characterize their properties. A total of 124 binary and 7 hierarchical triple star systems were detected among 2175 targets, whose multiplicity was investigated in the course of our survey, which are located at distances closer than about 500pc around the Sun. The detected companions and the targets are located at the same distance and share a common proper motion, as expected for components of gravitationally bound stellar systems, as proven with their accurate Gaia EDR3 astrometry. The companions have masses in the range between about 0.09 and 2.5$M_\odot$ and are most frequently found in the mass range between 0.15 and 0.8$M_\odot$. The companions exhibit projected separations to the targets between about 50 to 9700au and their frequency is the highest and constant up to about 500au, while it decreases for larger projected separations. In addition to mainly mid M to early K dwarfs, 4 white dwarf companions were detected in this survey, whose true nature could be identified with their photometric properties.

扫码加入交流群

加入微信交流群

微信交流群二维码

扫码加入学术交流群,获取更多资源