A statistical study of interplanetary shock associated proton intensity increases

Details A statistical study of interplanetary shock associated proton intensity increases A statistical study of interplanetary shock associated proton intensity increases

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983icrc....3..160r&link_type=abstract

International Cosmic Ray Conference, 18th, Bangalore, India, Aug. 22-Sept. 3, 1983, Paper. 4 p.

Physics

Interplanetary Medium, Particle Acceleration, Proton Flux Density, Shock Wave Propagation, Solar Protons, Energy Spectra, Flux Quantization, International Sun Earth Explorer 3, Magnetic Fields, Solar Flares

Scientific paper

Large intensity increases of low-energy protons are frequently observed in connection with interplanetary forward shocks. Essentially two different particle acceleration mechanisms to explain these 'ESP events' are presently under discussion. To find out which is the dominant process for particle acceleration a large number of these events observed on ISEE-3 was analyzed. The events with the highest fluxes of 35-56 keV protons are associated with shocks which are quasi-parallel and originate close to the central meridian of the sun, and it is concluded that they are produced by a first order Fermi acceleration process.

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