MeV magnetosheath ions energized at the bow shock

Details MeV magnetosheath ions energized at the bow shock MeV magnetosheath ions energized at the bow shock

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jgr...10619101c&link_type=abstract

Journal of Geophysical Research, Volume 106, Issue A9, p. 19101-19116

Physics

8

Interplanetary Physics: Planetary Bow Shocks, Magnetospheric Physics: Energetic Particles, Precipitating, Magnetospheric Physics: Magnetosheath, Magnetospheric Physics: Storms And Substorms

Scientific paper

A causal relationship between midlatitude magnetosheath energetic ions and bow shock magnetic geometry was previously established for ion energy up to 200 keVe-1 for the May 4, 1998, storm event. This study demonstrates that magnetosheath ions with energies above 200 keV up to 1 MeV simply extend the ion spectrum to form a power law tail. Results of cross-correlation analysis suggest that these ions also come directly from the quasi-parallel bow shock, not the magnetosphere. This is confirmed by a comparison of energetic ion fluxes simultaneously measured in the magnetosheath and at the quasi-parallel bow shock when both regions are likely connected by the magnetic field lines. We suggest that ions are accelerated at the quasi-parallel bow shock to energies as high as 1 MeV and subsequently transported into the magnetosheath during this event.

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