Large-amplitude electrostatic solitary structures in dusty plasmas with vortexlike variable charge dust distribution

A theoretical model is presented to show the existence, formation, and possible realization of large-amplitude solitary potentials in a charge varying dusty plasma with trapped dust particles. These nonlinear localized structures are self-consistent solutions of the Vlasov equation in which the dust response is non-Maxwellian due to the dust trapping in the large-amplitude plasma potentials. The soliton suffers the well-known anomalous damping, the importance of which is roughly proportional to the dust grain velocity. Our investigation may be taken as a prerequisite for the understanding of the electrostatic solitary waves that may occur in space dusty plasmas.

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