Other
Scientific paper
Aug 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995adspr..16...95w&link_type=abstract
Advances in Space Research (ISSN 0273-1177), vol. 16, no. 4, p. (4)95-(4)98
Other
1
Asteroids, Electric Conductors, Hall Effect, Magnetoacoustic Waves, Magnetohydrodynamic Flow, Magnetohydrodynamic Waves, Standing Waves, Approximation, Electric Potential, Far Fields, Io, Jupiter (Planet), Wave Equations
Scientific paper
The formation of standing MHD waves in a flowing plasma is a well understood and observed phenomena. However objects, such as asteroids and other small space bodies, may be small enough that the MHD approximation is not applicable. Inclusion of the Hall current effect is the most important modification in a cold plasma. Hall current effects included in an otherwise MHD formulation of the wave system generated by a point source current immersed in a warm compressible magnetoplasma couple the three MHD Alfven and magnetoacoustic modes in a dispersion as well as anisotropic system. In this paper, we consider the associated system of stationary waves generated in a flowing plasma, such as would arise from the inductive interaction between a conducting body and a magnetized plasma, as in the case of asteroid Gaspra or the Io-Jupiter system. In particular, in the special limit of a cold compressible flow we investigate the topology of the stationary wavecrest surfaces and the behavior of the flow, magnetic and electric potential fields in the far-field limit.
McKenzie James F.
Woodward T. I.
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