Parker instability in the presence of curved magnetic field lines

Details Parker instability in the presence of curved magnetic field lines Parker instability in the presence of curved magnetic field lines

Oct 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...225l..21a&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 225, Oct. 1, 1978, p. L21-L25.

Astronomy and Astrophysics

Astrophysics

34

Cosmic Plasma, Cosmic Rays, Interstellar Magnetic Fields, Lines Of Force, Magnetic Field Configurations, Magnetohydrodynamic Stability, Curvature, Gravitational Fields, Interstellar Matter, Perturbation Theory

Scientific paper

Necessary and sufficient variational criteria for the instability of two-dimensional, static, periodic equilibria of a system of gas, magnetic fields, and cosmic rays are derived; they emphasize the important role played by the curvature of the field lines. Application to periodic curved equilibrium states, related through flux freezing to an unstable, one-dimensional equilibrium of the Parker type, indicates that they are also unstable. It is shown that the growth rate of the instability, especially if cosmic rays are present, can be much faster than was previously thought.

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