The kinematics of the Scorpio-Centaurus association and Gould's belt.
The kinematics of the Scorpio-Centaurus association and Gould's belt.
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DOI：
10.1093/mnras/152.2.231
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发表时间：
1971-05
影响因子：
4.8
通讯作者：
D. Jones
中科院分区：
文献类型：
--
作者：
D. Jones
本文用极大似然法讨论了FK 4星表、古尔德星带（Clube）和天蝎座-半人马座星协（Bertiau）中所有恒星自行的收敛点。其中大约10%的恒星似乎形成了一个有顶点的扩展群，但确切的成员是模糊的，这个群不能用来校准光度标准。将讨论限制在天蝎座-半人马座附近，大大提高了共同推动者的集中度，可以分离出47颗恒星的确定名单。他们的顶点是。不确定度是最重要的坐标，它产生的光度不确定度可以忽略不计。由于顶点的不确定性，K项的不确定性为2倍。讨论是在良好的雅阁协议，除了FK 4自行比他使用的N30自行大约20%，因此所有的光度约0m.4暗淡。这些距离与银河经度有很好的相关性;剩余散射最多为18%。对由氢线指数和光谱类型导出的光度值进行了重新讨论。Hardorp和Strittmatter预测的自转引起的光度变化与观测结果进行了比较，在双星中，一个目视双星γLup提供了质量的测量，另外两个双星如果仔细观察的话应该提供轨道。食双星µ 1 Sco是其中一员，提供了质量、半径、光度和表面亮度的测量。
The convergent point of the proper motions of all stars in the FK4 catalogue, Gould's belt (Clube) and the Scorpio–Centaurus association (Bertiau) have been discussed by a maximum likelihood method. About 10 per cent of them seem to form an expanding group with vertexbut the exact membership is vague and the group cannot be used for calibrating luminosity criteria.Confining the discussion to the neighbourhood of Scorpio–Centaurus greatly improves the concentration of co-movers and a firm list of 47 stars can be isolated. Their vertex is. The uncertainty isin the most important co-ordinate which produces a negligible uncertainty in the luminosities. TheKterm is uncertain by a factor of two because of the uncertainty of the vertex. The discussion is in good accord with Bertiau except that the FK4 proper motions are about 20 per cent bigger than the N30 proper motions used by him and consequently all the luminosities are about 0m.4 fainter. The distances correlate well with galactic longitude; the residual scatter is 18 per cent at most. Luminosities derived from hydrogen line indices and spectral types are re-discussed. The changes in luminosity produced by rotation predicted by Hardorp & Strittmatter are compared with observation.Of the double stars, one visual binary,γLup, provides a measure of mass and two others should provide orbits if carefully followed. The eclipsing binaryµ1Sco is a member and provides a measure of mass, radius, luminosity and surface brightness.