Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...391..370k&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 391, no. 1, May 20, 1992, p. 370-379. Research supported by BMFT.
Astronomy and Astrophysics
Astrophysics
41
Energetic Particles, Particle Motion, Solar Corpuscular Radiation, Solar Flares, Emission Spectra, Particle Acceleration, Solar Storms
Scientific paper
A list of 77 flare-associated solar energetic particle (SEP) parent flares are classified as impulsive (25 cases) or gradual (52 cases) on the basis of their soft X-ray durations. The intensities of the prompt component of about 0.5 MeV electrons, about 10 MeV protons, and about 10 MeV per nucleon helium for the two classes of SEP flares are compared. SEPs from gradual flares have higher intensities than SEPs from impulsive flares. These differences are most pronounced for protons (about two orders of magnitude), and less for electrons (about one order of magnitude), and helium (about a factor of 5). The SEPs from impulsive flares have a 'cone of emission' of +/- 50 deg vs +/- 120 deg for gradual flares.
Cliver Edward W.
Kallenrode May-Britt
Wibberenz Gerd
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