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Nonlinear ion acoustic waves in dissipative and dispersive magneto‐rotating relativistic plasmas with two temperature superthermal electrons
Contributions to Plasma Physics ( IF 1.6 ) Pub Date : 2020-06-10 , DOI: 10.1002/ctpp.202000050
M.M. Abbasi 1, 2 , W. Masood 3 , Majid Khan 1 , Ali Ahmad 4
Affiliation  

A study has been presented for the nonlinear features of ion‐acoustic (IA) shock waves in a magnetorotating plasma consisting of warm viscous streaming ions along with kappa‐distributed electrons having two different temperatures. In this regard, we have employed the reductive perturbation technique to derive the Zakharov‐Kuznetsov‐Burgers (ZKB) equation that governs the dynamics of IA shock waves. The solution obtained by the hyperbolic tangent method has been shown to depend on various plasma parameters such as spectral index (κc), density fraction (f), effective rotation frequency (Ωc), ion kinematic viscosity (ηo), and temperature ratio (σ). In the limiting case when dissipative coefficient D → 0, we have also examined the solitary potential distributions, which are the solutions of Zakharov Kuznetsov (ZK) equation. It is found that both rarefactive and compressive structures exist for the system under consideration. The transition in the nature of such profiles is due to the enhancement in the density of cold electrons. The importance of present theoretical investigations has been carried out with regard to Saturn's magnetosphere, where two temperature superthermal electron populations have been observed by various satellite missions.

中文翻译:

具有两个温度超热电子的耗散和色散磁旋转相对论等离子体中的非线性离子声波

已经进行了一项研究,研究了磁热等离子体中离子声(IA)冲击波的非线性特征,该等离子体由温暖的粘性流态离子以及具有两个不同温度的κ分布电子组成。在这方面,我们采用了还原摄动技术来推导控制IA冲击波动力学的Zakharov-Kuznetsov-Burgers(ZKB)方程。由双曲正切方法获得的溶液已显示依赖于各种等离子体参数,如频谱指数(κ Ç),密度级分(˚F),有效旋转频率(Ω Ç),离子的运动粘度(η Ò),和温度比值(σ)。在耗散系数D  →0的极限情况下,我们还研究了孤立电位分布,这是Zakharov Kuznetsov(ZK)方程的解。发现正在考虑的系统同时存在稀疏和压缩结构。这种分布的性质的转变是由于冷电子密度的增加。关于土星的磁层已经进行了当前理论研究的重要性,在土星的磁层中,各种卫星任务观测到两个温度超热电子群。
更新日期:2020-06-10
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