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Two classes of solar energetic particle events associated with impulsive and long-duration soft X-ray flares
Cane, H. V.; McGuire, R. E.; von Rosenvinge, T. T.
AA(NASA, Goddard Space Flight Center, Greenbelt, MD), AB(NASA, Goddard Space Flight Center, Greenbelt, MD), AC(NASA, Goddard Space Flight Center, Greenbelt, MD)
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 301, Feb. 1, 1986, p. 448-459. (ApJ Homepage)
Publication Date:
Solar Physics
NASA/STI Keywords:
Energetic Particles, Particle Acceleration, Solar Electrons, Solar Flares, Solar Radio Bursts, Solar X-Rays, Gamma Rays, Shock Waves, Solar Protons, Solar Radio Emission, Type 3 Bursts, Type 5 Bursts
Bibliographic Code:


For the period 1978 September to 1983 December, 67 solar particle events have been identified for which the instruments detected electrons above 3 MeV and for which there are soft X-ray observations. The events are divided into two classes impulsive and long-duration - based on their signature in soft X-rays, and it is found that they have different properties. The events originating with impulsive flares are associated with intensed meter-wavelength type III bursts with associated type V continuum. The events associated with long-duration flares can originate anywhere on the solar disk, extend to much higher proton energies, and are well associated with coronal and interplanetary shocks; for about half of the long-duration events, the associated meter-wavelength events do not include type III bursts. The results discovered by Evenson et al. (1984) and by Kahler et al. (1984) are extended.

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