Physics
Scientific paper
Apr 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.2730s&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 93, April 1, 1988, p. 2730-2734.
Physics
12
Plasma Interactions, Plasma Waves, Shock Wave Propagation, Space Plasmas, Magnetic Fields, Propagation Velocity, Rankine-Hugoniot Relation
Scientific paper
The behavior of collisionless hydromagnetic shocks in interplanetary space is considered analytically, with a focus on relations, implicit in the governing Rankine-Hugoniot equations, involving the magnetic field (B) and the plasma velocity (V). A moving reference frame aligned with the shock is employed, and expressions are derived which make it possible (1) to determine the speed of a shock of arbitrary orientation from upstream and downstream measurements of B and V; (2) to characterize the change in flow direction as the plasma crosses the shock in terms of the plasma beta, the Mach number, and the angle between the upstream field and the shock normal; and (3) to infer the third component of the upstream-downstream velocity jump from B and two-dimensional V measurements. These expressions are applied to ISEE-3 data on an interplanetary shock on April 5, 1979, and the results are presented in tables.
Burton Marcia E.
Smith Edward. J.
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