Kinetic theory of Jeans'gravitational instability in millicharged dark matter system  

作　　者：Hui Chen Wei-Heng Yang Yu-Zhen Xiong San-Qiu Liu 陈辉;杨伟恒;熊玉珍;刘三秋(Jiangxi Province Key Laboratory of Fusion and Information Control,Department of Physics,Nanchang University,Nanchang 330031,China)

机构地区：[1]Jiangxi Province Key Laboratory of Fusion and Information Control,Department of Physics,Nanchang University,Nanchang 330031,China

出　　处：《Chinese Physics B》2022年第7期152-156,共5页中国物理B（英文版）

基　　金：the National Natural Science Foundation of China(Grant Nos.11763006 and 11863004);the fund from the Jiangxi Provincial Key Laboratory of Fusion and Information Control(Grant No.20171BCD40005);the Project of Scientific and Technological Innovation Base of Jiangxi Province,China(Grant No.20203CCD46008)。

摘　　要：The possibility of baryons cooled by a millicharged dark matter(mDM)via mDM–baryons scattering has recently been proposed to explain the observation discrepancy from the experiment to detect the global epoch of reionization signature(EDGES).In this sense,we analyze the Jeans instability of self-gravitational systems in the background of mDM under kinetic regime that the collisionless Boltzmann equation and Poisson equation have been combined to obtain the modified dispersion relation.It is shown that the effect of mDM is significant on the dynamics of gravitational collapse,i.e.,the presence of mDM makes the self-gravitational systems more difficult to collapse relatively.

关 键 词：self-gravitating systems millicharged dark matter Jeans instability 

分 类 号：P145.9[天文地球—天体物理]