The properties of close multiple stars
The properties of close multiple stars
复制标题
邻近多星的性质
DOI：
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发表时间：
1981
期刊：
影响因子：
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通讯作者：
F. Fekel
中科院分区：
文献类型：
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作者：
F. Fekel
考虑到最近的数值、分析和观测结果，对密切多重系统的性质进行了重新审查。43个分光多重系统的轨道根数列在一个表中。还提供了系统的光度数据表和描述其性能的数据。注意周期比，质量比，轨道共面性，稳定性，锂丰度和年龄估计，以及未来观测的前景。数值研究表明，碎裂产生的二元组分的质量比通常接近1.0，而裂变通常产生的质量比在0.1 - 0.5之间。利用解析稳定性准则，所有27个封闭多重系统被认为是稳定的，如果他们是共转。如果它们反向旋转，四个系统可能不稳定。然而，其他因素表明，即使这四个可能是稳定的。太阳型闭合多星系的年龄从1亿年到20亿年不等。
A reexamination of the properties of close multiple systems is conducted, taking into account recent numerical, analytical, and observational results. The orbital elements of 43 spectroscopic multiple systems are presented in a table. Tables with photometry data of the systems and data describing their properties are also provided. Attention is given to period ratios, mass ratios, orbital coplanarity, stability, lithium abundances and age estimates, and prospects of future observations. Numerical studies indicate that fragmentation produces binary components with mass ratios usually close to 1.0, while fission usually produces mass ratios in the range 0.1-0.5. Using analytical stability criteria, all 27 close multiple systems considered are stable if they are corotating. If they are counter-rotating, four systems are possibly unstable. However, other factors suggest that even these four are probably stable. The solar-type close multiple systems ranged in age from 100 million years to 2,000 million years.