Physics
Scientific paper
Apr 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.2191z&link_type=abstract
Journal of Geophysical Research, vol. 86, Apr. 1, 1981, p. 2191-2205.
Physics
46
Bow Waves, Earth Magnetosphere, Magnetosheath, Shock Wave Propagation, Solar Magnetic Field, Solar Wind, Space Plasmas, International Sun Earth Explorer 1, Interplanetary Magnetic Fields, Magnetohydrodynamic Flow, Magnetometers, Satellite-Borne Instruments, Solar Terrestrial Interactions
Scientific paper
A theoretical examination of the jump conditions of the bow shock is used to investigate the influence of the solar wind magnetic fields on the structure of the parameters behind the bow shock. Through the assumption that the average values of the parameters along the radial direction in the magnetosheath are equal to their values just behind the bow shock, the influence of the direction of the solar wind magnetic fields on the average structure of the magnetosheath is determined. From this assumption, a zero-order formula for the thickness of the magnetosheath is deduced which satisfies the boundary conditions and conservation laws of mass and momentum flux. The theoretical estimate of the thickness is compared with satellite observations to check the assumption and select the optimum value of the polytropic exponent of the plasma gas.
Russell Christopher T.
Zhuang H. C.
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