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McKenzie 1991
McKenzie, J.F. (1991). Stationary MHD waves generated by a source in a moving plasma. Journal of Geophysical Research 96: doi: 10.1029/91JA00046. issn: 0148-0227.

The inductive interaction between a conducting body and a magnetized plasma in relative motion is formulated in terms of a source driving stationary magnetohydrodynamic waves in the frame of the body. Of particular interest is the existence of analytic solutions which describe the stationary wave pattern associated with a point source current. Such solutions are significant because not only do they, in principle, facilitate the construction of more general solutions by serving as Green's functions but also they provide an asymptotic description of the far field of the stationary wave pattern generated from each point of a source of finite size. The total pressure perturbation exhibits a Laplacian type behavior in the case of ''subsonic'' flow and a Mach cone like disturbance for ''supersonic'' flow. On the other hand, the associated electric potential response is mixed in nature in that it consists of compressive magnetoacoustic perturbations as well as the well-known Alfv¿n wings corresponding to the shear Alfv¿n mode. In the subsonic case it is shown that although there is a strong disturbance in the potential on the Alfv¿n wings it is not narrowly confined to these wings by virtue of the two-dimensional dipolelike contributions from the fast magnetoacoustic mode. In supersonic flow the potential disturbance is swept downstream and confined to the fast Mach cone, on which it is singular and within lies the other singularity on the Alfv¿n wings. ¿1991 American Geophysical Union

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Abstract

Keywords
Space Plasma Physics, Kinetic and MHD theory, Magnetospheric Physics, MHD waves and instabilities, Space Plasma Physics, Spacecraft sheaths, wakes, charging
Journal
Journal of Geophysical Research
http://www.agu.org/journals/jb/
Publisher
American Geophysical Union
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