We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
On the generation of envelope solitons in the presence of excess superthermal electrons and positrons.
- Authors
Sabry, R.; Moslem, W.; Shukla, P.
- Abstract
theoretical model is presented to investigate the existence, formation, and possible realization of nonlinear envelope ion acoustic solitary waves which accompany collisionless electron-positron-ion plasmas with high-energy electrons and positrons (represented by kappa distribution). By employing the reductive perturbation method, the hydrodynamic model and the Poisson equation are reduced to nonlinear Schrödinger equation. The effects of the superthermal parameters, as well as ion-to-electron temperature ratio on the propagation and stability of the envelope solitary waves are examined. The superthermal parameters (ion-to-electron temperature ratio) give rise to instability (stability) of the solitary excitations, since the instability window is strongly modified. Finally, the present results should elucidate the excitation of the nonlinear ion-acoustic solitary wave packets in superthermal electron-positron-ion plasmas, particularly in interstellar medium.
- Subjects
SOLITONS; ELECTRON-positron interactions; HYDRODYNAMICS; PARAMETER estimation; INTERSTELLAR medium; ION acoustic waves; POISSON'S equation; ASTRONOMICAL perturbation
- Publication
Astrophysics & Space Science, 2011, Vol 333, Issue 1, p203
- ISSN
0004-640X
- Publication type
Article
- DOI
10.1007/s10509-010-0564-y