太阳邻域XXXV：南天距1404 M矮星系的距离在25 pc以内
The Solar Neighborhood XXXV: Distances to 1404 M Dwarf Systems Within 25 pc in the Southern Sky
摘要：
我们目前的三角，测光和摄影距离1748南（$δ\leq$ 0 $^\circ$）M矮系统与$μ\ge$ 0 \farcs 18年$^{-1}$，其中1404被认为是在25秒差距的太阳。这些恒星的$\leq$为6.67 $V_J$ $\leq$ 21.38和3.50 $\leq$（$V_J-K_s$）$\leq$ 9.27，涵盖了从M0.0 V到M9.5 V的整个M矮星光谱序列。因此，这个样本提供了我们目前对南方天空中最近的M矮星的知识的全面快照，这些矮星在银河系的恒星群中占主导地位。大约三分之一的1748个系统，其中每个都有一个M矮星的主要，已经发表了高质量的天体测量，包括179个来自RECONS天体测量计划。对于其余的系统，我们提供具有良好校准误差的光度距离估计。其中大部分（$\sim$ 700）是基于CTIO/SMARTS 0.9米望远镜获得的新的$V_JR_{KC}I_{KC}$测光，而其余500个原色则使用SuperCOSMOS $B_JR_{59F}I_{IVN}$测光计算了照相底片距离估计。样本中已确认和候选的次矮星已经被确定，并包括了一个同伴的普查。
英文摘要：
We present trigonometric, photometric, and photographic distances to 1748 southern ($δ\leq$0$^\circ$) M dwarf systems with $μ\ge$ 0\farcs18 yr$^{-1}$, of which 1404 are believed to lie within 25 parsecs of the Sun. The stars have 6.67 $\leq$ $V_J$ $\leq$ 21.38 and 3.50 $\leq$ ($V_J-K_s$) $\leq$ 9.27, covering the entire M dwarf spectral sequence from M0.0V through M9.5V. This sample therefore provides a comprehensive snapshot of our current knowledge of the southern sky for the nearest M dwarfs that dominate the stellar population of the Galaxy. Roughly one-third of the 1748 systems, each of which has an M dwarf primary, have published high quality parallaxes, including 179 from the RECONS astrometry program. For the remaining systems, we offer photometric distance estimates that have well-calibrated errors. The bulk of these ($\sim$700) are based on new $V_JR_{KC}I_{KC}$ photometry acquired at the CTIO/SMARTS 0.9m telescope, while the remaining 500 primaries have photographic plate distance estimates calculated using SuperCOSMOS $B_JR_{59F}I_{IVN}$ photometry. Confirmed and candidate subdwarfs in the sample have been identified, and a census of companions is included.
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