研究引力不稳定性的动理论方法  

ON KINETIC THEORY APPROACH FOR STUDYING GRAVITATIONAL INSTABILITY

作　　者：高建功[1] 沈天增[1] 

机构地区：[1]新疆工学院基础部,乌鲁木齐830008

出　　处：《新疆工学院学报》1996年第4期235-243,共9页

基　　金：国家自然科学基金!19563001

摘　　要：本文应用动理论研究无碰撞自引力系统．利用Vlasov方程和Poisson方程详细地研究在这种系统中扰动的演化和引力不稳定性，指出如何导出系统的色散关系和如何求积其中的因道积分．作为例子，详细介绍了来扰动粒子分布函数为Maxwellian分布的引力系统的不稳定模式．The collisionless self-gavitating systems are investigated with a kinetic theory apprcach.By using the Vlasov equation and the Poisson equation,the evolution of perturbation and the gravitational instabllity in these systems are studied in detail.The methods of deriving dispersion relations of the systems and integrating the contour integrals are pointed out.As an exsample,the instability modes for the self-gravitating system with a Maxwellian distribution function are introduced.

关 键 词：暗物质 色散关系 引力 不稳定性 动理论 

分 类 号：P131[天文地球—天体力学]