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Plasma Sci. Technol. ›› 2018, Vol. 20 ›› Issue (3): 035301.doi: 10.1088/2058-6272/aa96fa

• Astrophysics and Space Plasma • Previous Articles     Next Articles

Effect of polarization force on the Jeans instability in collisional dusty plasmas

A ABBASI and M R RASHIDIAN VAZIRI   

  1. Photonics and Quantum Technologies Research School, Nuclear Science & Technology Research Institute, Tehran, Iran
  • Received:2017-09-23 Published:2017-10-30

Abstract:

The Jeans instability in collisional dusty plasmas has been analytically investigated by considering the polarization force effect. Instabilities due to dust-neutral and ion-neutral drags can occur in electrostatic waves of collisional dusty plasmas with self-gravitating particles. In this study, the effect of gravitational force on heavy dust particles is considered in tandem with both the polarization and electrostatic forces. The theoretical framework has been developed and the dispersion relation and instability growth rate have been derived, assuming the plane wave approximation. The derived instability growth rate shows that, in collisional dusty plasmas, the Jeans instability strongly depends on the magnitude of the polarization force.

Key words: dusty plasmas, Jeans instability, instabilities in plasmas