Physics
Scientific paper
Oct 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.7843t&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 88, Oct. 1, 1983, p. 7843-7852. Research supported by the U.S. Department
Physics
30
Bow Waves, Ion Beams, Solar Terrestrial Interactions, Space Plasmas, Gyration, Kinematics, Magnetosheath, Solar Wind, Specular Reflection
Scientific paper
The kinematic formalism described by Schwartz et al. (1983) is used to quantitatively compare the zeroth order predicted energies for four different source hypotheses for ions detected upstream of the earth's bow shock with previously published observations of upstream field-aligned beams and gyrating ion events. Specular reflection of a fraction of the incident solar wind is found to be the most credible explanation of gyrating ion events observed upstream of shocks ranging from quasi-parallel to nearly perpendicular. The recent hypothesis that field-aligned beams are the result of leakage from the magnetosheath of ions which were originally specularly reflected at quasi-perpendicular portions of the shock provides good agreement with observed energies of many field-aligned beams. Only magnetic moment conserving reflection of solar wind ions is capable of accounting for two very energetic beam events.
Gosling Jack T.
Schwartz Steve J.
Thomsen Michelle F.
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