恒星核反应扩散系统中的涨落(英文)  

Fluctuations in stellar nuclear reaction-diffusion system

作　　者：杜九林[1] 

机构地区：[1]陕西师范大学物理与信息技术学院,陕西西安710062

出　　处：《陕西师范大学学报（自然科学版）》2003年第1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(19503002,19701021);陕西师范大学重点科研基金资助项目

摘　　要：研究了重力 温度梯度效应影响下的恒星核反应扩散系统中的涨落,分析了在核反应进行过程中与粒子数密度相关的振荡现象.分析得出:恒星内部存在粒子数密度的振荡现象和一系列涨落波在空间传播,重力 温度梯度效应是驱动振荡的主要原因,这类振荡可以引起恒星核能的产生出现周期性的时间变化.对p—p反应动力学模型的具体分析表明,由于3He的振荡性质,8B和7Be中微子流的产生将随时间变化.Fluctuations in stellar nuclear reactiondiffusion system affected by the gravitytemperature gradient effect are investigated and the oscillations related to the fluctuations of particle number density in the proceedings of the core nuclear reactions of stars are analyzed. It is shown that there are a series of fluctuation waves propagating in space and oscillations of particle number density in stellar cores, while the gravitytemperature gradient effect is responsible for producing the oscillations. These oscillations inside stars may lead to time oscillating of stellar nuclear energy generating. The production of the 8B and 7Be neutrino fluxes might not only be suppressed due to the nonlinear density enhancement of 3He but also be changing with time due to the oscillations of 3He. 

关 键 词：恒星 核反应扩散系统 涨落 振荡 粒子数密度 重力-温度梯度效应 P-P反应动力学模型 

分 类 号：P144[天文地球—天体物理]