Ion-acoustic solitary waves in a dense pair-ion plasma containing degenerate electrons and positrons
2008 (English)In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 372, no 22, 4057-4061 p.Article in journal (Refereed) PublishedText
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.
Place, publisher, year, edition, pages
Amsterdam: Elsevier, 2008. Vol. 372, no 22, 4057-4061 p.
warm multicomponent plasma, solitons, generation, beam
Fusion, Plasma and Space Physics
IdentifiersURN: urn:nbn:se:umu:diva-117497DOI: 10.1016/j.physleta.2008.02.086ISI: 000256463900019OAI: oai:DiVA.org:umu-117497DiVA: diva2:908711