Ions upstream of the earth's bow shock - A theoretical comparison of alternative source populations

Details Ions upstream of the earth's bow shock - A theoretical comparison of alternative source populations Ions upstream of the earth's bow shock - A theoretical comparison of alternative source populations

Mar 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.2039s&link_type=abstract

Journal of Geophysical Research, vol. 88, Mar. 1, 1983, p. 2039-2047. Research sponsored by the U.S. Department of Energy;

Physics

98

Bow Waves, Ion Motion, Particle Trajectories, Shock Wave Propagation, Ion Sources, Magnetic Field Configurations, Magnetic Moments, Magnetosheath, Specular Reflection

Scientific paper

The trajectories of ions reflected or leaked upstream from the earth's bow shock and subject solely to the Lorentz force in a steady interplanetary magnetic field B and the V x B electric field are studied theoretically. Expressions are obtained for the guiding center motion and gyromotion in a frame (the Hoffman-Teller frame) moving parallel to the shock surface with sufficient speed to transform the incident solar wind velocity into motion entirely along the interplanetary magnetic field. Equations are derived which transform these motions back to the observer's frame. The predicted upstream motions for four different source models for upstream ions are compared using these expressions: magnetic moment-conserving reflection of solar wind ions, specular reflection of solar wind ions, magnetic moment-conserving leakage of magnetosheath ions, and leakage of magnetosheath ions parallel to the shock normal.

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