自引力反应扩散系统的涨落  

On fluctuation of gravitational reaction_diffusion system

作　　者：杜九林[1] 

机构地区：[1]陕西师范大学物理学与信息技术学院,陕西西安710062

出　　处：《陕西师范大学学报（自然科学版）》2000年第4期33-38,共6页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目 !(1950 30 0 2 ;1970 10 2 1) ;陕西师范大学重点科研基金资助项目

摘　　要：根据非平衡态统计理论 ,获得了描述自引力反应扩散系统密度涨落的广义Master方程 .通过分析红巨星中心氦核反应扩散系统的涨落 ,认为尺度大于临界波长λc 区域内的氦核反应从引力上讲是不稳定的 ,一系列大波长涨落波将随时间指数增长 .For the reaction_diffusion system inside stars, the gravitation drives particles to flow inward, and therefore leads to the spatial correlation′s of density fluctuation. On the basis of non equilibrium statistical theory, the generalized Master equation is derived that describes the density fluctuation in the gravitational reaction_diffusion system. The helium nuclear reaction in the core of a red giant star is taken as an example to analyze the fluctuation. It is shown that the helium unclear reaction taking place in a region of scale more than the critical wave length λ c is unstable in gravitation, a series of fluctuation waves growing with time in the exponent way.

关 键 词：自引力 反应扩散系统 氨核反应 涨落 恒星 

分 类 号：P142[天文地球—天体物理] O571.42[天文地球—天文学]