Nonplanar ion-acoustic shocks in electron-positron-ion plasmas: Effect of superthermal electrons

被引：8
作者：
Ghosh, Deb Kumar [1 ]
Chatterjee, Prasanta [1 ]
Mandal, Pankaj Kumar [1 ,2 ]
Sahu, Biswajit [3 ]
机构：
[1] Visva Bharati Univ, Dept Math, Siksha Bhavana, Santini Ketan 731235, W Bengal, India
[2] Murshidabad Inst Technol, Dept Math, Murshidabad 742102, India
[3] West Bengal State Univ, Dept Math, Kolkata 700126, India
来源：
PRAMANA-JOURNAL OF PHYSICS | 2013年 / 81卷 / 03期
关键词：
Electron-positron-ion plasma; ion-acoustic waves; superthermal electron; ALFVEN VORTICES; MAGNETIC-FIELD; SOLITARY WAVES; SOLITONS; TRANSPORT; BEAM;
D O I：
10.1007/s12043-013-0588-2
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Ion-acoustic shock waves (IASWs) in a homogeneous unmagnetized plasma, comprising superthermal electrons, positrons, and singly charged adiabatically hot positive ions are investigated via two-dimensional nonplanar Kadomstev-Petviashvili-Burgers (KPB) equation. It is found that the profiles of the nonlinear shock structures depend on the superthermality of electrons. The influence of other plasma parameters such as, ion kinematic viscosity and ion temperature, is discussed in the presence of superthermal electrons in nonplanar geometry. It is also seen that the IASWs propagating in cylindrical/spherical geometry with transverse perturbation will be deformed as time goes on.
引用
收藏
页码：491 / 501
页数：11
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