Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.167..235s&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 167, no. 2, May 1990, p. 235-243.
Astronomy and Astrophysics
Astrophysics
Compressible Fluids, Larmor Radius, Magnetohydrodynamic Stability, Rotating Plasmas, Thermal Instability, Coriolis Effect, Free Convection, Magnetic Field Configurations, Plasma Interactions
Scientific paper
Thermal instability of a compressible rotating plasma in the presence of a uniform vertical magnetic field is studied to include the effects of finiteness of the ion-Larmor radius. When the instability sets in as stationary convection, the compressibility is found to have stabilizing effect. It is found that finite Larmor radius effects are always stabilizing for x greater than 2 and for x less than 2 they have a destabilizing influence in the presence of rotation. The stabilizing effect of Coriolis force is observed and for the case of no rotation, finite Larmor radius effects are always stabilizing. The sufficient conditions for the nonexistence of overstability are investigated.
Gupta Urvashi
Sharma K. C.
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