Acta Scientiarum Naturalium Universitatis Pekinensis

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The Gravitational Equilibrium of Spherically Symmetric Stars and the Oscillation near the Equilibrium

XU Renxin, QIAO Guojun   

  1. School of Physics, Peking University, Beijing, 100871
  • Received:2002-06-24 Online:2003-05-20 Published:2003-05-20

球对称恒星的引力平衡与平衡态附近的振荡

徐仁新,乔国俊   

  1. 北京大学物理学院,北京,100871

Abstract: The relation between the stellar oscillation frequency and the average density is obtained by a semi-qualitative consideration of the equilibrium between gravity and pressure. It is explained to measure a stellar distance according to a period-luminosity relation.

Key words: stars, gravitational equilibrium, Cepheid variables

摘要: 根据球对称恒星引力与压力间的平衡,用半定量方法得到了恒星振动周期与其平均密度的关系。简要地说明了周光关系方法测量恒星距离的原理。

关键词: 恒星, 引力平衡, 造父变星

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