Acceleration of energetic particles by shock waves from large solar flares

Details Acceleration of energetic particles by shock waves from large solar flares Acceleration of energetic particles by shock waves from large solar flares

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...358l..63r&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 358, Aug. 1, 1990, p. L63-L67.

Astronomy and Astrophysics

Astrophysics

59

Particle Acceleration, Shock Wave Interaction, Solar Flares, Solar Planetary Interactions, Heavy Elements, Mass Distribution, Solar Protons

Scientific paper

Time-intensity profiles for solar proton events are analyzed with respect to the acceleration of energetic particles from the ambient solar wind by an interplanetary shock. The time-intensity profiles are derived from the Helio 1 particle data base for 1974 to 1984. It is found that many of the large proton events display a prolonged plateau. The Fe/O abundances in the large proton events are studied. It is observed that initially the Fe/O ratio is high (about 1.0), but after proton intensities increase to about 100 protons/sq cm sr sec MeV the Fe/O ratio decreases to a value near 0.1.

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