UCAC3自行测量。II。在UCAC3中发现新的自行星，0.40 "yr ^-1> mu>= 0.18" yr ^-1介于-47 deg和00 deg之间
UCAC3 Proper Motion Survey. II. Discovery Of New Proper Motion Stars In UCAC3 With 0.40" yr^-1 > mu >= 0.18" yr^-1 Between Declinations -47 deg and 00 deg
摘要：
我们在南天发现了474个新的自行恒星系统，它们没有以前已知的组成部分，在赤纬-47度和00度之间，它们的年变化率为0.40 "^-1> mu>= 0.18"^-1。在这第二篇论文中，我们利用美国海军天文台第三CCD占星仪目录（UCAC 3）完成了对南部天空的扫描，寻找本调查目标自行范围内的物体，R星等范围为9.80至19.61。新的系统贡献了~16%的新恒星系统的数量增加了相同的天空区域在以前的超级宇宙侦察（SCR）调查报告。在新发现的恒星系统中，有16个倍数，加上另外10个组成部分，它们是以前已知物体的新的共同自行伴侣。UCAC3的自行与依巴谷、第谷2、南方自行（SPM 4）和超级宇宙的自行比较表明，除了超级宇宙之外，所有自行都与~10 mas/yr一致。本文对所有具有超宇宙巡天（SSS）B_J、R_59F和I_IVN等板星等和2微米全巡天（2MASS）红外测光的恒星系统进行了距离估算。我们发现了五个新的红矮星系统，估计在25 pc以内。这些发现支持了以前自行巡天的结果，表明将发现更多的邻近恒星系统，特别是在较暗、移动较慢的样本中。在这第二篇论文中，我们利用美国海军天文台第三CCD星表（UCAC3）完成了对南部天空中自行范围内物体的扫描，R星等范围从9.80到19.61。
英文摘要：
We present 474 new proper motion stellar systems in the southern sky having no previously known components, with 0.40" yr^-1 > mu >= 0.18" yr^-1 between declinations -47 deg and 00 deg. In this second paper utilizing the U.S. Naval Observatory third CCD Astrograph Catalog (UCAC3) we complete our sweep of the southern sky for objects in the proper motion range targeted by this survey with R magnitudes ranging from 9.80 to 19.61. The new systems contribute a ~16% increase in the number of new stellar systems for the same region of sky reported in previous SuperCOSMOS RECONS (SCR) surveys. Among the newly discovered stellar systems are 16 multiples, plus an additional 10 components that are new common proper motion companions to previously known objects. A comparison of UCAC3 proper motions to those from Hipparcos, Tycho-2, Southern Proper Motion (SPM4), and SuperCOSMOS indicates that all proper motions are consistent to ~10 mas/yr, with the exception of SuperCOSMOS. Distance estimates are derived for all stellar systems having SuperCOSMOS Sky Survey (SSS) B_J, R_59F, and I_IVN plate magnitudes and Two-Micron All Sky Survey (2MASS) infrared photometry. We find five new red dwarf systems estimated to be within 25 pc. These discoveries support results from previous proper motion surveys suggesting that more nearby stellar systems are to be found, particularly in the fainter, slower moving samples. In this second paper utilizing the U.S. Naval Observatory third CCD Astrograph Catalog (UCAC3) we complete our sweep of the southern sky for objects in the proper motion range targeted by this survey with R magnitudes ranging from 9.80 to 19.61.
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