非重子暗物质背景下引力系统的不稳定性  

On Instability of a Gravitational System with the Non-Baryon Dark Matter Backgroud

作　　者：王兆军[1] 高建功[1] 

机构地区：[1]新疆大学物理系,新疆乌鲁木齐830046

出　　处：《新疆大学学报（自然科学版）》2005年第1期51-54,共4页Journal of Xinjiang University(Natural Science Edition)

摘　　要：本文讨论存在非重子暗物质背景时成热力学气体状态的重子物质的引力不稳定性问题.分析了色散关系曲线的形状,讨论了阻尼解和不稳定解的可能形式.得到了阻尼时间与塌缩时间的解析公式.结果显示,非重子暗物质背景的存在将对引力系统的不稳定性产生重要影响.In this paper, we study the instability of a gravitational system composed of thermodynamic gas or star system as collisionless particles with dark matter background. We analyze qualitatively the dispersion relation curves and discuss the probable formes about damping and collapse solution. The analytic formulae of the damping and collapse time can be obtained. The results show that the existence of non-baryonic dark matter background influences seriousely the instability of a gravitational system.

关 键 词：暗物质 引力不稳定性 星系形成 

分 类 号：P14[天文地球—天体物理]