Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..95...37o&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 95, no. 1, Sept. 1983, p. 37-45.
Astronomy and Astrophysics
Astrophysics
4
Electrohydrodynamics, Hall Effect, Magnetohydrodynamic Stability, Plasma Layers, Rotating Plasmas, Stellar Atmospheres, Astrophysics, Coriolis Effect, Larmor Radius, Plasma Oscillations, Stratified Flow, Viscosity
Scientific paper
Instability in a horizontal layer of a stratified rotating self-gravitating plasma is studied to include simultaneously the effects of Hall currents and the finiteness of the ion Larmor radius. Proper solutions have been obtained through the variational methods for a semi-infinite plasma in which the density has an exponential gradient along the vertical. The dispersion relation obtained has been solved numerically and it is found that the growth rate of the unstable perturbations decreases with both coriolis forces and gyroviscous effects. The influence of the effects of gyroviscosity as well as of Coriolis forces is consequently stabilizing. Hall currents are found to have a destabilizing influence as the growth rate is found to increase with this effect.
Bhatia Prem Kumar
Opere O. M.
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