金星异常自转的一种可能形成机制  

A Possible Formation Mechanism of Venus's Abnormal Rotation

作　　者：刘凤收[1] 聂清香[2] 

机构地区：[1]枣庄学院物理与电子工程系,枣庄277160 [2]山东师范大学物理与电子科学学院,济南250014

出　　处：《天文学报》2010年第2期173-183,共11页Acta Astronomica Sinica

基　　金：国家自然科学基金(10774093)资助项目

摘　　要：金星的缓慢逆向自转与众不同，其形成机制曾吸引许多研究者的注意．从太阳引力场中行星际物质径向分布的不均匀性假设出发，推导并计算了行星际物质对类地行星自转的影响．结果表明，金星在形成初期可以具有典型的快速正向自转状态，在行星际物质作用下，自转连续变慢，在形成大约10^9yr后，自转反向并逐渐趋向稳定；对其它类地行星计算的结果也比较合理，水星的缓慢自转也得到自然的解释．The slow retrograde rotation state of Venus is very peculiar among the planets in the solar system, and its formation mechanism has arisen much attention. Based on the hypothesis that the radial distribution of interplanetary matter is not uniform in the solar system, its effect on the rotation of terrestrial planets is calculated. The results show that in the initial stage Venus may have almost the same rotation state like other planets in the solar system. Under the action of interplanetary matter, the rotation of Venus slows down, and becomes reversal after 1 billion years since its formation. The calculated results of other terrestrial planets are also comparatively reasonable. The slow rotation of Mercury can also be explained naturally.

关 键 词：行星与卫星 个别 天体力学 自转 行星际介质 

分 类 号：P185[天文地球—天文学]