Journal of Astronomy and Space Sciences

The Korean Space Science Society (한국우주과학회)
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THE EFFECT OF DUST PARTICLES ON ION ACOUSTIC SOLITARY WAVES IN A DUSTY PLASMA

  • Choi, Cheong-Rim (Department of Astronomy and Space Science, College of Natural Sciences and Institute for Basic Sciences Chungbuk National university) ;
  • Lee, Dae-Young (Department of Astronomy and Space Science, College of Natural Sciences and Institute for Basic Sciences Chungbuk National university) ;
  • Kim, Yong-Gi (Department of Astronomy and Space Science, College of Natural Sciences and Institute for Basic Sciences Chungbuk National university)
  • Published : 2004.09.01
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Abstract

In this paper we have examined the effect of dust charge density on nonlinear ion acoustic solitary wave which propagates obliquely with respect to the external magnetic field in a dusty plasma. For the dusty charge density below a critical value, the Sagdeev potential $\Psi1(n)$ has a singular point in the region n < 1, where n is the ion number density divided by its equilibrium number density. If there exists a dust charge density over the critical value, the Sagdeev potential becomes a finite function in the region n < 1, which means that there may exist the rarefactive ion acoustic solitary wave. By expanding the Sagdeev potential in the small amplitude limit up to on4 near n=1, we find the solution of ion acoustic solitary wave. Therefore we suggest that the dust charge density plays an important role in generating the rarefactive solitary wave.

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References

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