Interchange stability of a rapidly rotating magnetosphere

Details Interchange stability of a rapidly rotating magnetosphere Interchange stability of a rapidly rotating magnetosphere

Dec 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976p%26ss...24.1151h&link_type=abstract

Planetary and Space Science, vol. 24, Dec. 1976, p. 1151-1154.

Physics

19

Jupiter Atmosphere, Magnetic Flux, Magnetospheric Instability, Rotating Environments, Centrifugal Force, Magnetic Dipoles, Magnetohydrodynamic Stability, Plasma Density, Potential Energy

Scientific paper

A rotation-dominated magnetosphere is unstable to magnetic flux-tube interchange motions if and only if the plasma content of a unit magnetic flux tube is a decreasing function of distance from the spin axis. For a spin-aligned dipole field, an approximate expression is obtained for the marginally stable distribution. Plasma filling the Jovian magnetosphere from internal sources would initially violate this stability criterion so that interchange motions would act to establish the marginally stable distribution.

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