Nonplanar ion-acoustic solitary waves with superthermal electrons in warm plasma

被引：23

作者：

Eslami, Parvin ^{[2
]}

Mottaghizadeh, Marzieh ^{[3
]}

Pakzad, Hamid Reza ^{[1
]}

机构：

[1] Islamic Azad Univ, Dept Phys, Bojnourd Branch, Bojnourd, Iran

[2] Ferdowsi Univ Mashhad, Dept Phys, Mashhad, Iran

[3] Islamic Azad Univ, Dept Phys, Mashhad Branch, Mashhad, Iran

来源：

PHYSICS OF PLASMAS | 2011年 / 18卷 / 07期

关键词：

SOLAR-WIND; MODULATIONAL INSTABILITY; VELOCITY DISTRIBUTIONS; PERTURBATION METHOD; DRESSED SOLITONS; ALFVEN VORTICES; MAGNETIC-FIELD; POSITRON; TEMPERATURE; EQUILIBRIUM;

D O I：

10.1063/1.3613675

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

In this paper, we consider an unmagnetized plasma consisting of warm adiabatic ions, superthermal electrons, and thermal positrons. Nonlinear cylindrical and spherical modified Korteweg-de Vries (KdV) equations are derived for ion acoustic waves by using reductive perturbation technique. It is observed that an increasing positron concentration decreases the amplitude of the waves. Furthermore, the effects of the superthermal parameter (k) on the ion acoustic waves are found. (C) 2011 American Institute of Physics. [doi:10.1063/1.3613675]

引用

页数：6

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