Observations of suprathermal ions in association with SLAMS

Details Observations of suprathermal ions in association with SLAMS Observations of suprathermal ions in association with SLAMS

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20..149g&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 2, p. 149-152.

Physics

14

Bow Waves, Earth Atmosphere, Ion Temperature, Magnetic Field Configurations, Satellite Observation, Shock Waves, Extremely Low Radio Frequencies, Magnetohydrodynamic Flow

Scientific paper

We present observations of 1.4-20 keV ions in association with short large amplitude magnetic structures (SLAMS) using high time resolution AMPTE/UKS data near the quasi-parallel Earth's bow shock. The observations show a strong temporal gradient in the suprathermal ion pressure as the convecting SLAMS passes. We discuss these observations in the context of recent simulation studies which predict that SLAMS are the result of the steepening of a ULF wave as it passes through an energetic particle pressure gradient and present a simple picture illustrating the relationship between this spatial gradient and the observed temporal one.

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