SCR目标的太阳邻域XXIII CCD测光距离估算--77 M矮星系在25秒差距内
The Solar Neighborhood XXIII CCD Photometric Distance Estimates of SCR Targets -- 77 M Dwarf Systems within 25 Parsecs
摘要：
我们提出了100个SCR（SuperCOSMOS RECONS）系统的CCD测光距离估计与$μ$ $\geq$ 0 $\farcs$ 18/yr，其中28个是新发现以前未在本系列论文中发表。这些距离是使用在CTIO获得的新的$VRI$光度测定和从2 MASS提取的$JHK$星等的组合来估计的。这些估计值比使用SuperCOSMOS加上$JHK$的照相底片$BRI$星等确定的星等有所改进，如原始发现论文中所述。总的来说，在调查的100个系统中，有77个系统的预测值在25 pc以内。如果所有77个系统都被证实有$π$ $_{trig}$ $\ge$ 40毫角秒，这个样本将代表在南天接近25秒差距的M矮系统增加了23%。
英文摘要：
We present CCD photometric distance estimates of 100 SCR (SuperCOSMOS RECONS) systems with $μ$ $\geq$ 0$\farcs$18/yr, 28 of which are new discoveries previously unpublished in this series of papers. These distances are estimated using a combination of new $VRI$ photometry acquired at CTIO and $JHK$ magnitudes extracted from 2MASS. The estimates are improvements over those determined using photographic plate $BRI$ magnitudes from SuperCOSMOS plus $JHK$, as presented in the original discovery papers. In total, 77 of the 100 systems investigated are predicted to be within 25 pc. If all 77 systems are confirmed to have $π$$_{trig}$ $\ge$ 40 milliarcseconds, this sample would represent a 23% increase in M dwarf systems nearer than 25 pc in the southern sky.
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