太阳邻域LVI：最近3352个M矮星系统及其305个宽距伴星的RMSTAR星表
The Solar Neighborhood LVI: The RMSTAR Catalog of the Nearest 3352 M Dwarf Systems and 305 of their Wide Companions
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中文总结 AI 辅助
本文构建了25秒差距内3352个M矮星系统及其宽距伴星的RMSTAR星表，发现宽距恒星伴星多重性率为8.68%，并给出了光度与质量函数。
中文摘要 AI 辅助
我们呈现RMSTAR（RECONS M矮星）星表，这是一个25秒差距体积受限且体积上完整的样本，包含最近的3352个M矮星系统及其305个宽距恒星伴星和9个褐矮星伴星。RMSTAR仅使用来自《Gaia》数据发布3（GDR3）和2（GDR2）、《Hipparcos》的结果，以及地基发现的、在空间观测结果中不可用的M矮星系统。宽距伴星仅使用GDR3和GDR2的结果进行识别，其间距$\rho\ge0.''46$。共有291个主星带有恒星伴星，对于这些宽距系统，多重性率为8.68$\pm$0.49\\%，对于投影间距$s\geq30$天文单位，该比率为6.86$\pm$0.44\\%，在此范围内恒星伴星样本是完整的，除了少数边缘情况。结果表明，恒星伴星比率从搜索极限30,000天文单位向下到30天文单位间距逐渐增加，未来工作将表征更近间距的大量伴星。我们确定了所有恒星红矮星及其宽距伴星的光度和质量函数，发现光度函数在$M_G\sim11$处呈现经典转折，而质量函数则由从0.60太阳质量上升到恒星主序末端0.075太阳质量的指数函数描述。我们通过分析多个《Gaia》参数评估了M矮星附近未分辨伴星的大量群体，识别出1089个（30\\%）独立源具有至少一个升高的未分辨伴星指示参数。
英文摘要
We present the RMSTAR (RECONS M STAR) catalog, a 25 pc volume-limited and effectively volume-complete sample of the nearest 3352 M dwarf systems and their 305 wide stellar and 9 brown dwarf companions. RMSTAR has been created using only results from Gaia Data Releases 3 (GDR3) and 2 (GDR2), Hipparcos, and ground-based discoveries of M dwarf systems that are not available in the space-based results. The wide companions are identified using only results from GDR3 and GDR2, and have separations $ρ\ge0.''46$. There are 291 primaries with stellar companions, yielding a multiplicity rate of 8.68$\pm$0.49% for these widely separated systems, with a rate of 6.86$\pm$0.44% for projected separations $s\geq30$ au, where the sample of stellar companions is complete except perhaps for a few fringe cases. It is shown that the rate of stellar companions increases from the search limit of 30,000 au down to separations of 30 au, with a large set of companions to be characterized at closer separations in future work. We determine luminosity and mass functions for all stellar red dwarfs and their wide secondaries, finding that the luminosity function displays a classic turnover at $M_G\sim11$, whereas the mass function is described by an exponential function that rises from 0.60 M$_{\odot}$ to the end of the stellar main sequence at 0.075 M$_{\odot}$. We assess the large population of close, unresolved companions to M dwarfs by analyzing several Gaia parameters, identifying 1089 (30%) individual sources as having at least one of these elevated unresolved companion indication parameters.
发表机构
- Georgia State University（佐治亚州立大学）
- RECONS Institute（近距恒星研究合作所）
- Bridgewater State University（布里奇沃特州立大学）
- Five College Astronomy Department（五校天文系）
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