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Electron-positron-ion plasma with kappa distribution: Ion acoustic soliton propagation
Umeå University, Faculty of Science and Technology, Department of Physics. Ruhr Univ Bochum, Fak Phys & Astron, Inst Theoret Phys 4, D-44780 Bochum, Germany; Max Planck Inst Extraterr Phys, D-85741 Garching, Germany; GoLP Inst Super Tecn, P-1049001 Lisbon, Portugal; CCLRC Ctr Fundamental Phys, Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England; Univ Strathclyde, SUPA Dept Phys, Glasgow G 40NG, Lanark, Scotland; Univ Kwazulu Natal, Fac Sci & Agr, Sch Phys, ZA-4000 Durban, South Africa.
2010 (English)In: Physics Letters A, ISSN 0375-9601, Vol. 374, no 31-32, 3216-3219 p.Article in journal (Refereed) Published
Abstract [en]

Progress in understanding the nonlinear ion acoustic solitary waves which accompany collisionless electron-positron-ion plasmas with high-energy electrons and positrons (represented by kappa distribution) is presented. Both small and arbitrary amplitude solitary waves are investigated by deriving Korteweg-de Vries equation and energy-integral equation (involving a Sagdeev-like pseudopotential), respectively. The existence regions of the solitary pulses are defined precisely. Furthermore, numerical calculations reveal that only supersonic pulses may exist. The dependence of the solitary excitation characteristics on the superthermal parameters, the ion temperature, and the Mach number have been investigated. The present studies might be helpful to understand the excitation of nonlinear ion acoustic. solitary pulses in interstellar medium.

Place, publisher, year, edition, pages
2010. Vol. 374, no 31-32, 3216-3219 p.
National Category
Physical Sciences
URN: urn:nbn:se:umu:diva-109614DOI: 10.1016/j.physleta.2010.05.053ISI: 000280452700020OAI: diva2:858638
Available from: 2015-10-02 Created: 2015-10-02 Last updated: 2015-10-02Bibliographically approved

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Shukla, P. K.
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