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- Title
Planar and nonplanar ion acoustic shock waves with nonthermal electrons and positrons.
- Authors
Chatterjee, Prasanta; Ghosh, Deb; Sahu, Biswajit
- Abstract
The nonlinear propagation of ion acoustic shock waves (IASWs) are studied in an unmagnetized plasma consisting of nonthermal electrons, nonthermal positrons, and singly charged adiabatically hot positive ions, whose dynamics is governed by the two dimensional nonplanar Kadomstev-Petviashvili-Burgers (KPB) equation. The shock solution of the KPB equations is obtained numerically. The effects of several parameters and ion kinematic viscosities on the properties of ion acoustic shock waves are discussed in planar and nonplanar geometry. It is shown that the ion acoustic shock wave propagating in cylindrical/spherical geometry with transverse perturbation will be deformed as time goes on. Also, it is seen that the strength and the steepness of the IASWs increases with increasing β, the nonthermal parameter.
- Subjects
SOUND pressure; SOUND waves; THERMAL electrons; POSITRONS; ELASTIC wave propagation; PLASMA astrophysics; NONLINEAR wave equations
- Publication
Astrophysics & Space Science, 2012, Vol 339, Issue 2, p261
- ISSN
0004-640X
- Publication type
Article
- DOI
10.1007/s10509-012-1011-z