arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2306.02452astro-ph.SRastro-ph.EPastro-ph.GA
收藏

Gaia 搜索 TESS 感兴趣天体的恒星伴星 IV

Gaia Search for stellar Companions of TESS Objects of Interest IV

M. Mugrauer, J. Rück, K. -U. Michel

AI总结:

本研究利用 Gaia DR3 天体测量与测光数据,在 1106 个近距 TESS 感兴趣天体中识别恒星多重系统,并统计伴星质量、间距及白矮星伴星等性质。

摘要:

我们展示了正在进行的(社区)TESS 感兴趣天体多重性研究的最新结果,该研究利用 ESA-Gaia 任务的天体测量和测光数据来探测这些恒星的恒星伴星并表征其性质。在我们巡天过程中调查多重性的 1106 个目标中,共识别出 134 个双星系统、6 个层级三星系统和两个四星系统;这些目标位于距太阳约 500 pc 以内的距离处。正如精确的 Gaia DR3 天体测量所证明的,探测到的伴星与目标处于相同距离并具有共同自行,这与引力束缚恒星系统的组成部分相符。伴星质量约为 0.11 至 2$M_\odot$,在 0.2 至 0.5$M_\odot$ 的质量范围内数量最多。伴星与目标的投影间距约在 50 至 9700 au 之间。其频率在约 300 至 750 au 范围内最高且保持恒定,在更大投影间距处下降。除主序星外,本研究还探测到四颗白矮星伴星,其真实本质由它们的测光性质揭示。

英文摘要:

We present the latest results of our ongoing multiplicity study of (Community) TESS Objects of Interest, using astrometric and photometric data from the ESA-Gaia mission to detect stellar companions of these stars and characterize their properties.\linebreak A total of 134 binary, 6 hierarchical triple, and two quadruple star systems are identified among 1106 targets whose multiplicity is investigated in the course of our survey, located at distances closer than about 500pc around the Sun. The detected companions and targets are at the same distance and have a common proper motion, as expected for components of gravitationally bound stellar systems, as demonstrated by their accurate Gaia DR3 astrometry. The companions have masses from about 0.11 to 2$M_\odot$ and are most abundant in the mass range between 0.2 and 0.5$M_\odot$. The companions have projected separations from the targets between about 50 and 9700au. Their frequency is the highest and constant from about 300 up to 750au, decreasing at larger projected separations. In addition to main sequence stars, four white dwarf companions are detected in this study, whose true nature is revealed by their photometric properties.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑