Dust acoustic soliton energy in a mixed nonthermal high energy-tail electron distribution

Weak dust acoustic (DA) solitary waves are investigated in a mixed nonthermal high energy-tail electron distribution, focusing on the influence of an interplay between nonthermality and superthermality on the DA soliton energy. It is shown that in a pure superthermal plasma ( α =0), electron thermal...

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Bibliographic Details
Published in:Astrophysics and space science 2014-07, Vol.352 (1), p.171-174
Main Authors: Ait Gougam, Leila, Tribeche, Mouloud
Format: Article
Language:English
Subjects:
Acoustics
Astrobiology
Astronomy
Astrophysics
Astrophysics and Astroparticles
Cosmology
Dust
Electrons
Energy
Observations and Techniques
Original Article
Physics
Physics and Astronomy
Plasma physics
Solitary waves
Space Exploration and Astronautics
Space Sciences (including Extraterrestrial Physics
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Summary:Weak dust acoustic (DA) solitary waves are investigated in a mixed nonthermal high energy-tail electron distribution, focusing on the influence of an interplay between nonthermality and superthermality on the DA soliton energy. It is shown that in a pure superthermal plasma ( α =0), electron thermalization ( κ →∞) leads to an increase of the energy carried by the soliton. Addition of minute quantities of nonthermal electrons drastically modifies the κ -dependence of the soliton energy E κ , α . The latter first decreases, then exhibits a local minimum before leveling at a constant value. The energy exchange between the non-Maxwellian electrons and the localized solitary structure depends drastically on the interplay between superthermality and nonthermality.
ISSN:0004-640X
1572-946X
DOI:10.1007/s10509-014-1874-2