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

doi:10.1088/1674-1056/ac5239

中国物理B ›› 2022, Vol. 31 ›› Issue (7): 70401-070401.doi: 10.1088/1674-1056/ac5239

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

Hui Chen(陈辉)^†, Wei-Heng Yang(杨伟恒), Yu-Zhen Xiong(熊玉珍), and San-Qiu Liu(刘三秋)^‡

Jiangxi Province Key Laboratory of Fusion and Information Control, Department of Physics, Nanchang University, Nanchang 330031, China

收稿日期:2021-10-14 修回日期:2022-01-04 接受日期:2022-02-07 出版日期:2022-06-09 发布日期:2022-06-09
通讯作者: Hui Chen, San-Qiu Liu E-mail:hchen61@ncu.edu.cn;sqlgroup@ncu.edu.cn
基金资助:
Project supported by 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), and the Project of Scientific and Technological Innovation Base of Jiangxi Province, China (Grant No. 20203CCD46008).

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

Hui Chen(陈辉)^†, Wei-Heng Yang(杨伟恒), Yu-Zhen Xiong(熊玉珍), and San-Qiu Liu(刘三秋)^‡

Jiangxi Province Key Laboratory of Fusion and Information Control, Department of Physics, Nanchang University, Nanchang 330031, China

Received:2021-10-14 Revised:2022-01-04 Accepted:2022-02-07 Online:2022-06-09 Published:2022-06-09
Contact: Hui Chen, San-Qiu Liu E-mail:hchen61@ncu.edu.cn;sqlgroup@ncu.edu.cn
Supported by:
Project supported by 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), and the Project of Scientific and Technological Innovation Base of Jiangxi Province, China (Grant No. 20203CCD46008).

摘要/Abstract

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

Abstract: 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.

Key words: self-gravitating systems, millicharged dark matter, Jeans instability

中图分类号: (Self-gravitating systems; continuous media and classical fields in curved spacetime)

04.40.-b

95.35.+d (Dark matter) 05.20.Dd (Kinetic theory)

Hui Chen(陈辉), Wei-Heng Yang(杨伟恒), Yu-Zhen Xiong(熊玉珍), and San-Qiu Liu(刘三秋). Kinetic theory of Jeans' gravitational instability in millicharged dark matter system[J]. 中国物理B, 2022, 31(7): 70401-070401.

Hui Chen(陈辉), Wei-Heng Yang(杨伟恒), Yu-Zhen Xiong(熊玉珍), and San-Qiu Liu(刘三秋). Kinetic theory of Jeans' gravitational instability in millicharged dark matter system[J]. Chin. Phys. B, 2022, 31(7): 70401-070401.

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

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

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