Large-scale flow in the dayside magnetosheath

Details Large-scale flow in the dayside magnetosheath Large-scale flow in the dayside magnetosheath

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....89.9711c&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 89, Nov. 1, 1984, p. 9711-9719. Research sponsored by the U.S. Department

Other

16

Daytime, Earth Magnetosphere, Magnetohydrodynamic Flow, Magnetosheath, Plasma Dynamics, Space Plasmas, Flow Geometry, Satellite Observation

Scientific paper

The degree of control over plasma flow direction exerted by the compressed magnetic field in the dayside magnetosheath is examined by comparing ISEE 1 LEPEDEA data with hydrodynamic and MHD predictions. In 11 of 20 observed cases, the flow pattern followed the predictions of simple hydrodynamic theory; in the nine other cases, the flow deviated from this pattern. One case with large deflection was persistent over 1.5 hr, and its direction was consistent with a stagnation point displacement resulting from increased, asymmetric magnetic field pressure contributions during periods of low Alfven Mach number. The eight other cases of observed large deflection are consistent with either the subsolar merging line or the antiparallel merging hypothesis, but not exclusively with one or the other.

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