Astrophysics and Space Science

, Volume 139, Issue 2, pp 337–352 | Cite as

Gravitational stability of finitely conducting two-component plasma through porous medium

  • R. K. Chhajlani
  • D. S. Vaghela
Article

Abstract

The gravitational stability of magnetized self-gravitating two-component plasma of finite conductivity flowing through porous medium is studied. Effect of magnetic field, porosity, viscosity, finite conductivity, and neutral gas friction is considered on the stability of the system. Dispersion relations are derived from linearized equations using normal mode analysis. Longitudinal and transverse wave propagations are discussed. On the basis of Hurwitz criterion, the stability of the system is discussed. It is found that Jeans's criterion determines the stability of the system. Jeans's expression depends on the sonic speeds in both the components. For transverse wave propagation in perfectly conducting plasma. Jeans's expression is modified due to magnetic field and porosity but in case of finitely conducting plasma the Jeans's expression remains unaltered. Collisional frequency, viscosity, permeability of the porous medium have damping effect.

Keywords

Viscosity Magnetic Field Permeability Porosity Porous Medium 

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Copyright information

© D. Reidel Publishing Company 1987

Authors and Affiliations

  • R. K. Chhajlani
    • 1
  • D. S. Vaghela
    • 1
  1. 1.School of Studies in PhysicsVikram UniversityUjjainIndia

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