大学物理 ›› 2018, Vol. 37 ›› Issue (8): 8-12.doi: 10.16854 /j.cnki.1000-0712. 170625

• 教学研究 • 上一篇    下一篇

过客流体天体的洛希极限

于凤军   

  1. 安阳师范学院物理与电气工程学院,河南安阳455000
  • 收稿日期:2017-11-15 修回日期:2018-01-11 出版日期:2018-08-20 发布日期:2018-08-20
  • 作者简介:于凤军(1959—),男,河南安阳人,安阳师范学院物理与电气工程学院教授,主要从事理论物理、天体力学

The Roche’s limit of fluid guest aster

YU Feng-jun   

  1. College of Physics and Electrical Engineering,Anyang Normal University,Anyang,Henan 455000,China
  • Received:2017-11-15 Revised:2018-01-11 Online:2018-08-20 Published:2018-08-20

摘要: 19 世纪中叶,法国天文学家洛希给出了流体伴星的洛希极限. 过客流体天体———本文指从相对于它质量很大的主 星附近经过的流体天体,如果它与主星的距离满足一定的条件,可以被主星引潮力撕裂,本文用最小势能原理导出这个条件.

关键词: 过客天体, 引潮力, 洛希极限, 自能, 最小势能原理

Abstract: In the middle of the nineteenth century,the French astronomer Roche reported the Roche’s limit of fluid companion star. Fluid guest aster refers to a fluid object passing through a main star with large mass. If the distance between the fluid guest aster and its main star satisfies certain conditions,it should be torn by the tidal force of the main star. This condition is derived by using the principle of minimum potential energy.

Key words: guest aster, tidal force, Roche’s limit, self energy, principle of minimum potential energy