论文标题
太阳能社区。 xlvi。揭示新的M矮人二进制室及其轨道架构
The Solar Neighborhood. XLVI. Revealing New M Dwarf Binaries and their Orbital Architectures
论文作者
论文摘要
我们在CTIO/SMARTS 0.9-M上使用Recons计划中使用20年的天文数据，以提供对太阳能社区中多个恒星系统的新见解。我们为210个系统提供新的和更新的视差，并推导9个高质量的天文轨道，周期为2.49 - 16.63年。使用重新质子的总共542个系统的视差，我们将25个PARSEC内的系统与Gaia DR2进行比较，以定义从DR2结果中选择未解决的星体倍数的标准。我们发现，DR2 25 PC内的四个未解决的多明星红色矮人系统中有三分之三具有parallax_error $ \ geq 0.32 $ mas，astrometric_gof_al $ \ geq 56 $，astrometric_excess_noise_noise_noise_sig $重新一个结果。这些标准在针对附近恒星的任何工作中都有广泛的应用，从寻求二进制系统的研究到针对单一恒星进行行星搜索的努力。
We use 20 years of astrometric data from the RECONS program on the CTIO/SMARTS 0.9-m to provide new insight into multiple star systems in the solar neighborhood. We provide new and updated parallaxes for 210 systems and derive nine high-quality astrometric orbits with periods of 2.49 - 16.63 years. Using a total of 542 systems' parallaxes from RECONS, we compare systems within 25 parsecs to Gaia DR2 to define criteria for selecting unresolved astrometric multiples from the DR2 results. We find that three out of four unresolved multi-star red dwarf systems within 25 pc in DR2 have parallax_error $\geq 0.32$ mas, astrometric_gof_al $\geq 56$, astrometric_excess_noise_sig $\geq 108.0$, ruwe $\geq 2.0$, and parallaxes more than $\sim$10% different than the long-term RECONS results. These criteria have broad applications to any work targeting nearby stars, from studies seeking binary systems to efforts targeting single stars for planet searches.
