FROM BINARIES TO MULTIPLES. I. DATA ON F AND G DWARFS WITHIN 67 pc OF THE SUN
FROM BINARIES TO MULTIPLES. I. DATA ON F AND G DWARFS WITHIN 67 pc OF THE SUN
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DOI：
10.1088/0004-6256/147/4/86
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发表时间：
2014-01
期刊：
影响因子：
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通讯作者：
A. Tokovinin
中科院分区：
文献类型：
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作者：
A. Tokovinin
给出了在距太阳67pc范围内F型和G型矮星的多重数数据。这个基于依巴谷星表的距离有限的样本包含了4847颗主星(目标)，完成率为0.590%。已知的恒星对有2196对；其中一些属于从三重到五重的361个等级系统。建立了径向速度、天文加速度、直接分辨率和一般自身运动的伴星探测模型。它们用于计算每个目标的完备性，使用此处收集的有关其覆盖范围的信息。大约80%的主星伴星被探测到，但对次级恒星中的子系统的普查只有30%左右。二进制分量的质量是根据它们的绝对大小或通过其他方法估计的；宽对的周期是根据它们的投影分离来估计的。周期短于∼100年的双星中，有三分之一是周期和质量比未知的光谱和/或天体测量对。这些数据在随附的文件II中用来得出分层多系统的无偏统计数据。
Data on the multiplicity of F- and G-type dwarf stars within 67 pc of the Sun are presented. This distance-limited sample based on the Hipparcos catalog contains 4847 primary stars (targets) with 0.5 90% complete. There are 2196 known stellar pairs; some of them belong to 361 hierarchical systems from triples to quintuples. Models of companion detection by radial velocity, astrometric acceleration, direct resolution, and common proper motion are developed. They serve to compute completeness for each target, using the information on its coverage collected here. About 80% of companions to the primary stars are detected, but the census of subsystems in the secondary components is only about 30%. Masses of binary components are estimated from their absolute magnitudes or by other methods; the periods of wide pairs are evaluated from their projected separations. A third of binaries with periods shorter than ∼100 yr are spectroscopic and/or astrometric pairs with yet unknown periods and mass ratios. These data are used in the accompanying Paper II to derive unbiased statistics of hierarchical multiple systems.