Ion-acoustic solitary waves in a dense pair-ion plasma containing degenerate electrons and positrons
Abdelsalam, U.M. and Moslem, W.M. and Shukla, P.K. (2008) Ion-acoustic solitary waves in a dense pair-ion plasma containing degenerate electrons and positrons. Physics Letters A, 372 (22). pp. 4057-4061. ISSN 0375-9601 (http://dx.doi.org/10.1016/j.physleta.2008.02.086)
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Fully nonlinear propagation of ion-acoustic solitary waves in a collisionless dense/quantum electron-positron-ion plasma is investigated. The electrons and positrons are assumed to follow the Thomas-Fermi density distribution and the ions are described by the hydrodynamic equations. An energy balance-like equation involving a Sagdeev-type pseudo-potential is derived. Finite amplitude solutions are obtained numerically and their characteristics are discussed. The small-but finite-amplitude limit is also considered and an exact analytical solution is obtained. The present studies might be helpful to understand the excitation of nonlinear ion-acoustic solitary waves in a degenerate plasma such as in superdense white dwarfs.
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Item type: Article ID code: 19646 Dates: DateEvent26 May 2008PublishedSubjects: Science > Physics > Plasma physics. Ionized gases Department: Faculty of Science > Physics Depositing user: Strathprints Administrator Date deposited: 04 Jun 2010 08:47 Last modified: 08 Apr 2024 17:38 URI: https://strathprints.strath.ac.uk/id/eprint/19646