Elemental abundances in corotating events

Details Elemental abundances in corotating events Elemental abundances in corotating events

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986icrc....9..547v&link_type=abstract

In its Nineteenth International Cosmic Ray Conference. Conference Papers: Invited Rapporteur, Highlight, Miscellaneous, Volume 9

Other

Abundance, Cosmic Rays, Energetic Particles, Particle Acceleration, Solar Wind, Anisotropy, International Sun Earth Explorer 3, Particle Energy, Solar Flares

Scientific paper

Large, persistent solar-wind streams in 1973 and 1974 produced corotating interaction regions which accelerated particles to energies of a few MeV/nucleon. The proton to helium ratio (H/He) reported was remarkably constant at a value (22 + or - 5) equal to that in the solar wind (32 + or - 3), suggesting that particles were being accelerated directly out of the solar wind. Preliminary results from a similar study approximately 11 years (i.e., one solar cycle) later are reported. Corotating events were identified by surveying the solar wind data, energetic particle time-histories and anisotropies. This data was all obtained from the ISEE-3/ICE spacecraft. These events also show H/He ratios similar to that in the solar wind. In addition, other corotating events were examined at times when solar flare events could have injected particles into the corresponding corotating interaction regions. It was found that in these cases there is evidence for H/He ratios which are significantly different from that of the solar wind but which are consistent with the range of values found in solar flare events.

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