Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984ap%26ss.106..245k&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 106, no. 2, Nov. 1984, p. 245-255.
Astronomy and Astrophysics
Astrophysics
6
Compressible Flow, Magnetohydrodynamic Stability, Plasma Acceleration, Rotating Fluids, Rotating Plasmas, Taylor Instability, Flow Equations, Perturbation Theory, Plasma Equilibrium
Scientific paper
The stability of a plane-stratified slab of perfectly conducting, rotating, compressible, inviscid plasma accelerated by a magnetic field is considered. Exact solutions for the growth rates of the unstable modes are determined for a gamma-law gas when the undisturbed equilibrium is an isothermal atmosphere of semiinfinite extent with no frozen-in field. It is shown that the rotation has no effect on the region of unstable modes, which has wavelengths that are long compared with the atmospheric scale height. On the other side, the growth rates in the presence of rotation are less than those in the absence of rotation for unstable modes.
Khater A. H.
Obied Allah M. H.
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