Solitary Dust--Acoustic Waves in a Plasma with Two-Temperature Ions and Distributed Grain Size

Details Solitary Dust--Acoustic Waves in a Plasma with Two-Temperature Ions and Distributed Grain Size Solitary Dust--Acoustic Waves in a Plasma with Two-Temperature Ions and Distributed Grain Size

2008-12-02

arxiv.org/abs/0812.0485v1

Astronomy and Astrophysics

Astrophysics

16 pages, 6 figures

Scientific paper

10.1134/S1063780X09010103

The propagation of weakly nonlinear dust--acoustic waves in a dusty plasma containing two ion species with different temperatures is explored. The nonlinear equations describing both the quadratic and cubic plasma nonlinearities are derived. It is shown that the properties of dust--acoustic waves depend substantially on the grain size distribution. In particular, for solitary dust--acoustic waves with a positive potential to exist in a plasma with distributed grain size, it is necessary that the difference between the temperatures of two ion species be large that that in the case of unusized grains.

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