The Solar Neighborhood XV: Discovery of New High Proper Motion Stars with mu >= 0.4"/yr between Declinations -47 degrees and 00 degrees
The Solar Neighborhood XV: Discovery of New High Proper Motion Stars with mu >= 0.4"/yr between Declinations -47 degrees and 00 degrees
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太阳邻域 XV：发现赤纬 -47 度和 00 度之间 mu >= 0.4 英寸/年的新高自行恒星
DOI：
10.1086/444540
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
U. Edinburgh
中科院分区：
文献类型：
--
作者：
J. Subasavage;T. Henry;N. Hambly;Misty A. Brown;W. Jao;C. University;Institute for Astronomy;U. Edinburgh
我们通过我们的SuperCOSMOS - RECONS（SCR）搜索，报告了在南天（赤纬=-47度到00度）发现的152个新的高自行系统（μ >= 0.4"/年），它们比英国施密特望远镜 plates R_{59F}=16.5更亮。本文是《太阳邻域》系列论文第十二篇的补充，第十二篇论文涵盖了赤纬从 -90度到 -47度的区域，并讨论了搜索最南端阶段的所有147个新系统。在这两篇论文总共299个系统中，有148个（第十二篇论文中有71个，本文中有77个）新系统的自行速度大于0.5"/年，它们是经典的“LHS”（卢伊滕半秒）样本的新增成员。这些使得南天所有μ >= 0.5"/年的恒星系统样本增加了8%。
如同在第十二篇论文中一样，这里所报告的系统的距离估计是基于照相底片星等和2MASS光度测量的结合，并假设所有恒星都位于主序上。本文所涉及天空区域中的两个SCR系统预计在10秒差距以内，另外23个在25秒差距以内。总体而言，第十二篇论文以及本文中关于整个南天的这次SCR扫描所呈现的结果包括5个在10秒差距以内的新系统以及38个在10到25秒差距之间的新系统。在最慢的自行区间（0.6"/年 > μ >= 0.4"/年）发现的近邻系统数量最多，这表明在太阳附近可能存在大量低自行系统。
We report the discovery of 152 new high proper motion systems (mu >= 0.4"/yr) in the southern sky (Declination = -47 degrees to 00 degrees) brighter than UKST plate R_{59F} =16.5 via our SuperCOSMOS-RECONS (SCR) search. This paper complements Paper XII in The Solar Neighborhood series, which covered the region from Declination = -90 degrees to -47 degrees and discussed all 147 new systems from the southernmost phase of the search. Among the total of 299 systems from both papers, there are 148 (71 in Paper XII, 77 in this paper) new systems moving faster than 0.5"/yr that are additions to the classic ``LHS'' (Luyten Half Second) sample. These constitute an 8% increase in the sample of all stellar systems with mu >= 0.5"/yr in the southern sky.
As in Paper XII, distance estimates are provided for the systems reported here based upon a combination of photographic plate magnitudes and 2MASS photometry, assuming all stars are on the main sequence. Two SCR systems from the portion of the sky included in this paper are anticipated to be within 10 pc, and an additional 23 are within 25 pc. In total, the results presented in Paper XII and here for this SCR sweep of the entire southern sky include five new systems within 10 pc and 38 more between 10 and 25 pc. The largest number of nearby systems have been found in the slowest proper motion bin, 0.6"/yr > mu >= 0.4"/yr, indicating that there may be a large population of low proper motion systems very near the Sun.