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Yamauchi et al. 1993
Yamauchi, M., Lundin, R. and Lui, A.T.Y. (1993). Vorticity equation for MHD fast waves in geospace environment. Journal of Geophysical Research 98: doi: 10.1029/93JA00638. issn: 0148-0227.

The magnetohydrodynamic (MHD) vorticity equation is modified in order to apply it to nonlinear MHD fast waves or shocks when their extent along the magnetic field is limited. Field-aligned current (FAC) generation is also discussed on the basis of this modified vorticity equation. When the wave normal is not aligned to the finite velocity convection and the source region is spatially limited, a longitudinal polarization (uJ) causes a pair of plus and minus charges inside the compressional plane waves or shocks, generating a pair of FACs. This polarization is not related to the separation between the electrons and ions caused by their difference in mass (i.e., Langmuir mode), a separation which is inherent to compressional waves. The resultant double field-aligned current structure exists both with and without the contributions from curvature drift, which is questionable in terms of its contribution to vorticity change from the viewpoint of single-particle motion. ¿ American Geophysical Union 1993

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Abstract

Keywords
Space Plasma Physics, Kinetic and MHD theory, Magnetospheric Physics, Current systems, Magnetospheric Physics, Magnetospheric configuration and dynamics, Space Plasma Physics, Nonlinear phenomena
Journal
Journal of Geophysical Research
http://www.agu.org/journals/jb/
Publisher
American Geophysical Union
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