Alternative dust acoustic solitary waves in a plasma consistingof superthermal electrons and nonthermal ions havingkappa-vortex-like velocity distribution function

The existence of arbitrary amplitude dust acoustic solitary waves is investigated in an unmagnetized dusty plasma comprising a negatively charged dust fluid, superthermal electrons, and nonthermal ions having a κ -vortex-like velocity distribution function. It is shown that due to electron and ion s...

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Published in:Physics of plasmas 2009-08, Vol.16 (8), p.083701-083701-7
Main Authors: Aoutou, Kamel, Tribeche, Mouloud, Zerguini, Taha Houssine
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Tribeche, Mouloud
Zerguini, Taha Houssine
description The existence of arbitrary amplitude dust acoustic solitary waves is investigated in an unmagnetized dusty plasma comprising a negatively charged dust fluid, superthermal electrons, and nonthermal ions having a κ -vortex-like velocity distribution function. It is shown that due to electron and ion superthermality, the present dusty plasma model may support subsonic as well as supersonic electrostatic solitary waves involving cusped potential humps. The interplay between different concepts of nonisothermality is highlighted. Our results should help to understand the role that phase-space holes may play in reconnection by scattering and energizing particles and to provide an explanation of the intense solitary structures observed by the FAST mission.
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title Alternative dust acoustic solitary waves in a plasma consistingof superthermal electrons and nonthermal ions havingkappa-vortex-like velocity distribution function
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