Physics
Scientific paper
Dec 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983angeo...1..527l&link_type=abstract
Annales Geophysicae (ISSN 0755-0685), vol. 1, Nov.-Dec. 1983, p. 527-536.
Physics
17
Bow Waves, Ion Emission, Oblique Shock Waves, Solar Wind, Interplanetary Magnetic Fields, Ion Scattering, Simulation, Trajectory Analysis
Scientific paper
One-dimensional, hybrid (particle ions, fluid electrons) numerical simulations of oblique shock structure are used to analyze the mechanism by which solar wind ions can be reflected off the earth's bow shock front and escape upstream. It is shown that no backstreaming ions are produced in the simulation over 50-90 degrees of theta(nB), the angle between the interplanetary magnetic field and the shock normal. Backstreaming ions are emitted for theta(nB) of 45 degrees or less, with characteristics in reasonable agreement with those of observed reflected ion streams. The simulated shock structure becomes rather turbulent as theta(nB) decreases from 45 to 30 degrees. Analysis of the backstreaming ion trajectories shows that all backstreaming ions are originally specularly reflected. The oblique shock structure and effects such as whistler formation and ion heating are discussed.
Leroy Marie
Winske Dan
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