We present the latest results of our ongoing multiplicity study of (Community) TESS Objects of Interest, using astro- and photometric data from the ESA-Gaia mission, to detect stellar companions of these stars and to characterize their properties. In total, 107 binary, 5 hierarchical triple star systems, as well as one quadruple system were detected among 585 targets surveyed, which are all located at distances closer than about 500 pc around the Sun. As proven with their accurate Gaia EDR3 astrometry, the companions and the targets are located at the same distance and share a common proper motion, as it is expected for components of gravitationally bound stellar systems. The companions exhibit masses in the range between about 0.09 M_⊙ and 4.5 M_⊙ and are most frequently found in the mass range between 0.15 and 0.6 M_⊙. The companions are separated from the targets by about 120 up to 9,500 au and their frequency is the highest and constant within about 500 au while it continually decreases for larger separations. Beside mainly early to mid M dwarfs, also five white dwarf companions were identified in this survey, whose true nature was revealed by their photometric properties.

中文翻译：

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盖亚寻找 TESS 感兴趣对象 II 的恒星伴星

我们使用来自 ESA-Gaia 任务的天体和光度学数据，展示了我们正在进行的（社区）TESS 感兴趣对象的多重性研究的最新结果，以探测这些恒星的伴星并表征它们的特性。在调查的 585 个目标中，总共检测到 107 个双星系统、5 个分层三重星系统以及一个四重星系统，这些目标都位于太阳周围约 500 pc 的距离内。正如他们精确的 Gaia EDR3 天体测量所证明的那样，伴星和目标位于相同的距离并共享一个共同的自行运动，正如引力束缚恒星系统的组成部分所期望的那样。伴星的质量大约在 0.09 M _⊙和 4.5 M _{⊙ 之间}并且最常见于 0.15 到 0.6 M _⊙之间的质量范围内。伴星与目标相距约 120 至 9,500 天文单位，它们的频率在约 500 天文单位内最高且恒定，而随着间隔较大，它会不断降低。除了主要是早中期 M 矮星外，本次调查还确定了 5 颗白矮星伴星，它们的真实性质通过它们的光度学特性得以揭示。