恒星结构的稳定性研究

Stability of the Stellar Structure

恒星是一个热核反应体系,已有很多学者对其结构稳定性做过研究.作为粒子数可变的体系,宏观性质可以用下述动力学方程组描述:(1) 分析系统的定态解是否稳定以及在什么条件下由稳定转变为不稳定,一个有效而简便的方法是小扰动简正模方法.

A star is open systems which is far away from thermodynamic equilibrium and exchanges energy and matter with the outside. we use the method of nonequi librium dynamics to study the stability of stellar structure. It is concluded that the stars located at the upper part of main-sequence are stable, and the reaction of CNO cycle is their mair evergy source, This conclusion is in accord with facts. On the other hand, the diffusion cannot change the stability of stellar structure which is in stable state.