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Effect of non-thermal ion distributions on the Jeans instability in dusty plasmas

  • S. R. PILLAY (a1) and F. VERHEEST (a2) (a3)

Abstract

Non-thermal ion distributions are a characteristic feature of space plasmas, and in the current work the influence of such non-thermal ion distributions on the Jeans instability is examined. Following previous general models, the electrons are taken to be Boltzmann on the timescales involved, whilst the negative dust component is modelled by the continuity and momentum equations. The ion dynamics are described via a non-thermal Cairns distribution. The linear dispersion relation is derived and analysed for varying degrees of deviation from ordinary thermal behaviour, determined by the characteristic parameter of the Cairns distribution.

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It is a pleasure to dedicate this paper to Alan Cairns on the occasion of his 60th birthday.

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Effect of non-thermal ion distributions on the Jeans instability in dusty plasmas

  • S. R. PILLAY (a1) and F. VERHEEST (a2) (a3)

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