Physics – Plasma Physics
Scientific paper
Jun 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jgr....9911539f&link_type=abstract
Journal of Geophysical Research, Volume 99, Issue A6, p. 11539-11546
Physics
Plasma Physics
19
Interplanetary Physics: Planetary Bow Shocks, Magnetospheric Physics: Magnetosheath, Space Plasma Physics: Shock Waves, Space Plasma Physics: Charged Particle Motion And Acceleration
Scientific paper
The origins of ion heating at the Earth's bow shock are explored for a wide range of Mach numbers using data from composition experiments that separate solar wind H+ and He2+ downstream from the shock. Both of these ion species are important in the production of low-frequency waves in the downstream magnetosheath. Consistent with previous results, the majority of the H+ dissipation at the bow shock is provided by a relatively small amount of the incident solar wind distribution that specularly reflects off the shock and returns to the downstream region. Although the He2+ distribution downstream from the shock may show some evidence for a reflected-returned component, this component has a much lower relative density compared to that of the analogous H+ component and does not have the same strong Mach number dependence. Thus in contrast to the H+ results, the He2+ dissipation at the shock is provided by the directly transmitted core of the distribution.
Fuselier Stephen A.
Schmidt Wolfgang K. H.
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