On the generation of envelope solitons in the presence of excess superthermal electrons and positrons

Sabry, R. and Moslem, W. M. and Shukla, P. K. (2011) On the generation of envelope solitons in the presence of excess superthermal electrons and positrons. Astrophysics and Space Science, 333 (1). pp. 203-208. ISSN 0004-640X (https://doi.org/10.1007/s10509-010-0564-y)

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Abstract

A 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 Schrodinger 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.

  • Item type:Article
    ID code:40552
    Dates:
    Date
    Event
    May 2011
    Published
    16 December 2010
    Published Online
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:25 Jul 2012 13:17
    Last modified:11 Nov 2024 10:11
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/40552
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