Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980icrc....5..363h&link_type=abstract
In: International Cosmic Ray Conference, 16th, Kyoto, Japan, August 6-18, 1979, Conference Papers. Volume 5. (A81-12386 02-93) T
Astronomy and Astrophysics
Astronomy
Cosmic Rays, Energetic Particles, Plasma-Particle Interactions, Shock Wave Propagation, Solar Flares, Solar Wind, Particle Telescopes, Solar Activity Effects, Spaceborne Astronomy, Voyager 2 Spacecraft
Scientific paper
The elemental composition at energies near 1 MeV/nucleon has been studied for three recurrent energetic particle events during the period August-October, 1978, with the low-energy-charged-particle instruments on Voyager 1/2 near 4 AU. These events are associated with forward/reverse shock pairs in the solar wind as identified by the MIT plasma experiments on Voyager. In all three events, the flux increases associated with the reverse shocks showed enhancements in the He/H and CNO/H ratios compared to typical solar flare composition. The average C/O ratio for the three events was 0.68 which is larger than for normal solar flares but somewhat smaller than the average value found for corotating events at 1 AU during the previous solar minimum (1974-1976).
Armstrong Thomas P.
Axford Wiliam Ian
Bostrom C. O.
Fan Chang-Yun
Gloeckler George
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