非平衡动力学中恒星结构稳定性研究  

Instability of the Stellar Structure in Nonequilibrium Dynamics

作　　者：杜九林[1] 史志强[1] 陈福生[2] 

机构地区：[1]陕西师范大学物理系 [2]江西大学物理系

出　　处：《天体物理学报》1991年第2期143-148,共6页

摘　　要：采用非平衡动力学方法研究由CNO循环决定的恒星结构稳定性,本文得出:CNO循环自身是稳定的;扩散效应不会改变处于稳定的恒星结构稳定性;对流效应对其稳定性有重要影响,波数小的扰动更容易激发不稳定性;巨大的温度梯度也能激发不稳定性。本文给出了稳定性条件和恒星结构保持稳定所允许的最小扰动波数。The method of nonequilibrium dynamics is used to study the stability of stellar structure, including chemical reaction, diffusion and convection. We find that CNO cycle is stable. The diffusion can not change the stability of the stable state. The convection will be an important effect on its stability. Instability of stellar structure is more easily excited by perturpation with small wave number and great temperature gradient in star. When stellar structure is in stable state, the stable conditionand the minimum perturpating wave numberare given.

关 键 词：恒星 恒星结构 非平衡动力学 

分 类 号：P152.4[天文地球—天文学]