Weak, quasiparallel profiles of earth's bow shock - A comparison between numerical simulations and ISEE 3 observations on the far flank

Details Weak, quasiparallel profiles of earth's bow shock - A comparison between numerical simulations and ISEE 3 observations on the far flank Weak, quasiparallel profiles of earth's bow shock - A comparison between numerical simulations and ISEE 3 observations on the far flank

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.2301g&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, Dec. 1991, p. 2301-2304.

Physics

6

Bow Waves, Earth Magnetosphere, Shock Waves, Solar Terrestrial Interactions, Solar Wind Velocity, Extremely Low Radio Frequencies, International Sun Earth Explorer 3, Magnetic Field Configurations, Mathematical Models

Scientific paper

Over 200 crossings of the distant downwind flanks of earth's magnetosonic bow shock by ISEE 3 included many cases of weak, or low Mach number, quasi-parallel shocks. A consistent feature of the magnetic field profiles was the presence of large amplitude, near periodic to irregular transverse oscillations downstream from even the weakest Q-parallel shocks. Large downstream perturbations with whistler-like features similar to those of the observations appear in 1D simulations when the Alfven Mach number M(A) is greater than 2.5 but not when M(A) = 2.1. The observed cases with downstream waves also occurred when M(A) is greater than about 2.5, suggesting the importance of the Alfven as opposed to magnetosonic Mach number in determining the signature of weak, Q-parallel shocks.

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