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

作者：Ghosh Deb Kumar; Chatterjee Prasanta; Mandal Pankaj Kumar; Sahu Biswajit^*

来源：Pramana - Journal of Physics, 2013, 81(3): 491-501.

DOI：10.1007/s12043-013-0588-2

• Electron-positron-ion plasma
• ion-acoustic waves
• superthermal electron

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.

• 出版日期2013-9