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Impulsive 2-10 keV solar electron events not associated with flares
Potter, D. W.; Lin, R. P.; Anderson, K. A.
AA(California, University, Berkeley, Calif.), AB(California, University, Berkeley, Calif.), AC(California, University, Berkeley, Calif.)
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 236, Mar. 1, 1980, p. L97-L100. (ApJL Homepage)
Publication Date:
Solar Physics
NASA/STI Keywords:
Energetic Particles, Interplanetary Medium, Particle Acceleration, Satellite Observation, Solar Electrons, Angular Distribution, Energy Spectra, International Sun Earth Explorer 3, Solar Corona, Solar Wind
Bibliographic Code:


Data from the ISEE 3 satellite reveal a class of impulsive solar electron events with no measurable increase in flux above 10-20 keV. The flux histories and angular distributions indicate that the electrons propagate through interplanetary space with little or no scattering. The smooth extension of the power-law energy spectra down to the limit of the observations at 2 keV indicates that the electrons are accelerated at altitudes greater than 0.5 solar radii in the solar corona. Although these events occur more frequently than any other type of impulsive solar particle event observed, no correlation is found with flares or flare-related activity. However, there is a close correlation with low-frequency type III radio bursts.

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Database: Astronomy
arXiv e-prints