Shock-associated low-energy ion enhancements observed by Voyagers 1 and 2

Details Shock-associated low-energy ion enhancements observed by Voyagers 1 and 2 Shock-associated low-energy ion enhancements observed by Voyagers 1 and 2

Sep 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.8819d&link_type=abstract

Journal of Geophysical Research, vol. 86, Sept. 30, 1981, p. 8819-8831.

Physics

41

Ion Concentration, Particle Energy, Particle Interactions, Shock Wave Interaction, Solar Wind, Voyager 1 Spacecraft, Voyager 2 Spacecraft, Energy Spectra, Heliosphere, Helium, Hydrogen, Interplanetary Trajectories, Nucleons, Solar Flares, Jupiter, Voyager 1, Voyager 2, Shock, Ions, Observations, Lecp, Flux, Low Energy Charged Particle Experiment, Particles, Dynamics, Data, Storms, Kinematics, Experiments, Energy, Spectrum, Acceleration, Corotation, Intensity, Magnitude, Scattering

Scientific paper

Observations of shock-associated ion enhancements at energies of not less than 30 keV are presented from data gathered by Voyagers 1 and 2. Observations include examples of energetic storm particle events associated with flare-produced shocks and examples of corotating particle events (CPE) associated with forward and reverse shocks that bound corotating interaction regions in the outer heliosphere. Most of the CPE have recurrent double-peaked intensity enhancements showing little or no velocity dispersion at peak intensities, time durations of several days, and soft energy spectra extending up to 5 MeV/nucleon. The lowest energy ion enhancements are confined mainly downstream of the corotating interaction regions with the magnitude and duration of the upstream enhancements increasing with increasing ion energy. The observations are consistent with the dynamical and kinematical effects expected when low energy ions are accelerated at quasi-perpendicular shocks.

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