Suprathermal ions upstream from interplanetary shocks

Details Suprathermal ions upstream from interplanetary shocks Suprathermal ions upstream from interplanetary shocks

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....89.5409g&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 89, July 1, 1984, p. 5409-5418. Research sponsored by the U.S. Department

Physics

26

Interplanetary Medium, Ion Motion, Shock Waves, Space Plasmas, International Sun Earth Explorers, Ion Distribution, Velocity Distribution

Scientific paper

Low energy (10 eV-30 keV) observations of suprathermal ions ahead of outward propagating interplanetary shock waves (ISQ) are reported. The data were taken with the fast plasma experiment on ISEE 1 and 2 during 17 events. Structure was more evident in the suprathermal ion distribution in the earth bow shock region than in the upstream region. Isotropic distributions were only observed ahead of ISW, although field alignment, kidney-bean distributions, ion shells in velocity space and bunches of gyrating ions were not. The data suggest that the solar wind ions are accelerated to suprathermal energies in the vicinity of the shocks, which feature low and subcritical Mach numbers at 1 AU.

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