Abstract
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.
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Ait Gougam, L., Tribeche, M. Dust acoustic soliton energy in a mixed nonthermal high energy-tail electron distribution. Astrophys Space Sci 352, 171–174 (2014). https://doi.org/10.1007/s10509-014-1874-2
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DOI: https://doi.org/10.1007/s10509-014-1874-2