密近双星自转的测量和研究(Ⅲ)──同步性的统计性质  

Measurement and Study of Rotation in Close Binary Stars (Ⅲ) Statistical Analysis of Synchronization

作　　者：潘开科[1] 

机构地区：[1]中国科学院云南天文台

出　　处：《天体物理学报》1996年第3期291-297,共7页

基　　金：国家自然科学基金;国家攀登计划资助

摘　　要：我们对前文（Ⅰ）和（Ⅱ）的实测和计算结果进行了统计分析，讨论了自转同步与相对半径、轨道周期间的关系．结果表明：几乎所有r＞0．18的不相接双星系统子星都是同步的，而r＜0．10的子星均处于非同步自转．在相接、半相接双星系统中，同步性与相对半径r也有很好的相关性，但由于子星间物质交流的影响，它们的同步性临界相对半径为0．21，大于不相接双星系统的0.18．As a continuation of paPers Ⅰ, Ⅱ, this article presents the statistical relations between synclironization, the fractional radii and the periods in early close eclipsing binaries. In order to make our conclusions more reliable, we excluded all Ap, Of , Am and other unusual components. By dividing the sa-mples into colltact, semi-detached and detached groups, we fotmd that there ekist lindting fractional radii above which synchronization can be regarded as a rule. The limiting r is about 0.21 in contact and semi-detached systems, and 0.18 for detached binaries. The difference between the two limiting radii can be, at least partially, attributed to the mass and angular momentum transfers in contact and semi-detached systems.

关 键 词：恒星 密近双星 同步自转 

分 类 号：P153[天文地球—天文学]