非旋转银河系的重力不稳定性(英文)  

Gravitational Instability of a Nonrotating Galaxy

作　　者：赵午 

机构地区：[1]Stanford Linear Accelerator Center

出　　处：《高能物理与核物理》2006年第z1期6-10,共5页High Energy Physics and Nuclear Physics

基　　金：美国能源部(DE-AC02-76SF00515)资助~~

摘　　要：银河系中星体分布的重力不稳定性在天文物理是个熟知的问题．尝试以加速器物理的方法初步分析了这个现象,得到非旋转银河系在它的大小超过某阈值时会呈现不稳定现象的结论,而此阈值与银河系的质量密度有关．Gravitational instability of the distribution of stars in a galaxy is a well-known phenomenon in astrophysics. This work is a preliminary attempt to analyze this phenomenon using the standard tools developed in accelerator physics. By applying this analysis, it is found that a stable nonrotating galaxy would become unstable if its size exceeds a certain limit that depends on its mass density.

关 键 词：银河系 重力不稳定性 Vlasov方程 LANDAU阻尼 

分 类 号：P156[天文地球—天文学]