Planar and nonplanar ion-acoustic envelope solitary waves in a very dense electron-positron-ion plasma

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Sabry, R. and Moslem, W.M. and Shukla, P.K. (2009) Planar and nonplanar ion-acoustic envelope solitary waves in a very dense electron-positron-ion plasma. European Physical Journal D: Atomic, Molecular, Optical and Plasma Physics, 51 (2). pp. 233-240. ISSN 1434-6060 (http://dx.doi.org/10.1140/epjd/e2008-00286-8)

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Abstract

Ion-acoustic envelope solitary waves in a very dense plasma comprised of the electrons, positrons and ions are investigated. For this purpose, the quantum hydrodynamic model and the Poisson equation are used. A modified nonlinear Schr¨odinger equation is derived by employing the reductive perturbation method. The effects of the quantum correction and of the positron density on the propagation and stability of the envelope solitary waves are examined. The nonplanar (cylindrical/spherical) geometry gives rise to an instability period. The latter cannot exist for planar case and it affected by the quantum parameters, as well as the positron density. The present investigation is relevant to white dwarfs.

  • Item type:Article
    ID code:19272
    Dates:
    Date
    Event
    9 January 2009
    Published
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Strathprints Administrator
    Date deposited:22 Oct 2010 10:41
    Last modified:11 Nov 2024 09:24
    URI:https://strathprints.strath.ac.uk/id/eprint/19272
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