"MeV magnetosheath ions energized at the bow shock" by S. Chang, J. D. Scudder et al.
 

Abstract

A causal relationship between midlatitude magnetosheath energetic ions and bow shock magnetic geometry was previously established for ion energy up to 200 keV e−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.

Department

Physics

Publication Date

9-1-2001

Journal Title

Journal of Geophysical Research: Space Physics

Publisher

American Geophysical Union

Digital Object Identifier (DOI)

10.1029/2000JA003037

Document Type

Article

Rights

Copyright 2001 by the American Geophysical Union.

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