The stability of an anisotropic plasma jet

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Anisotropic Fluids, Magnetohydrodynamic Stability, Plasma Jets, Compressible Fluids, Cosmic Plasma, Differential Equations, Jet Boundaries, Magnetic Fields, Perturbation Theory, Plasma Conductivity, Wave Dispersion

Scientific paper

The modified Chew-Goldenberger-Low equations have been used to study the stability of a resistive anisotropic plasma jet surrounded by a nonconducting compressible gas. The dispersion relation has been obtained and discussed in three limiting situations: (1) the resistivity vanishingly small, (2) short, and (3) long wavelength perturbations. In some cases, the limiting situations of very small or very large ratio of the density of the plasma jet to the density of the exterior gas have been discussed. The conditions for instability have been obtained. It has been found that the resistivity introduces new modes which make the plasma jet overstable. In the limit of large wavelength disturbances, the jet with finite but high conductivity is found to be unstable. For small wavelength disturbances, the jet is found to be unstable.

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