The longitudinal plasma modes in mDM-plasma system

Y Z Xiong,H Chen,S Q Liu

doi:10.1063/5.0050112

Abstract

In the present paper, the dispersions and Landau damping of the ion acoustic waves in the dark plasma system with non-extensive distributed millicharged dark matter particles are investigated under the kinetic theory regimes. The result shows that the peculiarities of the Landau damping of the waves depend on the parameter q of the distribution function. However, the growth rate due to the streaming dark matter is acutely tiny compared to the damping rates arising from the electrons and ions. As a result, both Maxwellian and non-extensive distributions are strongly damped by the dark matter. Hence, the waves cannot be stimulated yet.

Highlights

It has been reported that about 85% of the mass in our universe consists of dark matter (DM), which plays a determinant role in the evolutions and dynamics of the universe
It has shown that traditional dark matter only has gravitational interaction with the baryons, such as the weakly interacting massive particles (WIMPs), axion, or sterile neutrino
The charged DM that is composed of charged massive particles (CHAMP’s) can survive annihilation in the early universe

Summary

INTRODUCTION

It has been reported that about 85% of the mass in our universe consists of dark matter (DM), which plays a determinant role in the evolutions and dynamics of the universe. Most of the observation data and indirect experiments have been devoted to exploring the nature of dark matter (DM). Due to the existence of the charged dark matter in the supernova remnants, the instabilities of the dark plasma waves have been documented for the Maxwellian case to study the dynamics of millicharged dark matter It seems that the distribution of mDM was fitted with non-extensive distribution well, which indicates that it is reasonable to study the dynamics of the dark plasma wave in such a situation. Keeping those in mind, in the present work, we re-study the dynamics of the dark plasma wave behind the scenes of supernova remnants within the non-extensive statistics kinetic regime.

NON-EXTENSIVE DISTRIBUTION FUNCTION

THE LANDAU DAMPING OF ION ACOUSTIC WAVE

NUMERICAL RESULTS AND DISCUSSION