Journal
PHYSICS OF PLASMAS
Volume 18, Issue 8, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.3620411
Keywords
astrophysical plasma; Korteweg-de Vries equation; nonlinear differential equations; plasma ion acoustic waves; plasma simulation; plasma solitons; Schrodinger equation
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Funding
- Arab Fund for Economic and Social Development (Kuwait) under the Arab Fund
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Generation of nonlinear ion-acoustic waves in a plasma having nonextensive electrons and positrons has been studied. Two wave modes existing in such plasma are considered, namely solitary and rogue waves. The reductive perturbation method is used to obtain a Korteweg-de Vries equation describing the system. The latter admits solitary wave pulses, while the dynamics of the modulationally unstable wave packets described by the Korteweg-de Vries equation gives rise to the formation of rogue excitation that is described by a nonlinear Schroumldinger equation. The dependence of both solitary and rogue waves profiles on the nonextensive parameter, positron-to-ion concentration ratio, electron-to-positron temperature ratio, and ion-to-electron temperature ratio are investigated numerically. The results from this work are expected to contribute to the in-depth understanding of the nonlinear excitations that may appear in nonextensive astrophysical plasma environments, such as galactic clusters, interstellar medium, etc. (C) 2011 American Institute of Physics. [doi:10.1063/1.3620411]
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