Ion-acoustic solitary waves in a dense pair-ion plasma containing degenerate electrons and positrons

U.M. Abdelsalam, W.M. Moslem, P.K. Shukla

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

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.
LanguageEnglish
Pages4057-4061
Number of pages4
JournalPhysics Letters A
Volume372
Issue number22
DOIs
Publication statusPublished - 26 May 2008

Fingerprint

positrons
solitary waves
acoustics
ions
electrons
hydrodynamic equations
density distribution
propagation
excitation
energy

Keywords

  • warm multicomponent plasma
  • solitons
  • generation
  • beam

Cite this

Abdelsalam, U.M. ; Moslem, W.M. ; Shukla, P.K. / Ion-acoustic solitary waves in a dense pair-ion plasma containing degenerate electrons and positrons. In: Physics Letters A. 2008 ; Vol. 372, No. 22. pp. 4057-4061.
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Ion-acoustic solitary waves in a dense pair-ion plasma containing degenerate electrons and positrons. / Abdelsalam, U.M.; Moslem, W.M.; Shukla, P.K.

In: Physics Letters A, Vol. 372, No. 22, 26.05.2008, p. 4057-4061.

Research output: Contribution to journalArticle

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T1 - Ion-acoustic solitary waves in a dense pair-ion plasma containing degenerate electrons and positrons

AU - Abdelsalam, U.M.

AU - Moslem, W.M.

AU - Shukla, P.K.

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N2 - 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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KW - warm multicomponent plasma

KW - solitons

KW - generation

KW - beam

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