A spectrographic study of Beta Centauri.
A spectrographic study of Beta Centauri.
复制标题
半人马座贝塔星的光谱研究。
DOI：
10.1093/mnras/172.3.639
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发表时间：
1975
影响因子：
4.8
通讯作者：
N. Lomb
中科院分区：
文献类型：
--
作者：
N. Lomb
利用1969年获得的光谱，表明β cen的径向速度以0d为周期变化。1969年是157人。该恒星的宽谱线轮廓检查形状的变化与上述周期。由于这颗恒星是单线光谱双星，其组成部分的亮度大致相等，因此搜索工作相当复杂，因为在这样的双星中，一个组成部分相对于另一个组成部分的速度变化可能引起虚假的变化。然而，在一系列预测混合轮廓图的帮助下，可以证明，对于讨论中的观测，发现的任何变化都可能是恒星固有的。事实上，剖面的变化与径向速度周期有关；曲线变化与径向速度曲线的相位关系与窄线β cma恒星相同。
Using spectra obtained in 1969, it is shown that the radial velocity ofβCen was varying with a period of 0d.157 in 1969. The broad spectral line profiles of the star are examined for changes in shape with the above period. This search is considerably complicated by the fact that the star is a single line spectroscopic binary with components of approximately equal brightness, as in such a binary spurious variations may be caused by the variation in the velocity of one component with respect to the other. However, with the help of a series of graphs of predicted blended profiles it is demonstrated that, for the observations under discussion, any variations found are likely to be intrinsic to the star. Variations in the profiles are, in fact, found with the radial velocity period; the phase relations between the changes in the profiles and the radial velocity curve are the same as in the narrow-linedβCMa stars.