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The Source Regions of Impulsive Solar Electron Events View all abstracts by submitter

Arnold O. Benz   Submitted: 2001-06-28 01:35

Low-energy (2 - 19 keV) impulsive electron events observed in interplanetary space have been traced back to the Sun, using their interplanetary type III radiation and metric/decimetric radio-spectrograms. For the first time we are able to study the highest frequencies and thus the radio signatures closest to the source region. All the selected impulsive solar electron events have been found to be associated with an interplanetary type III burst. This allows to time the particle events at the 2 MHz plasma level and identify the associated coronal radio emissions. Except for 5 out of 27 cases, the electron events were found to be associated with a coronal type III burst in the metric wavelength range. The start frequency yields a lower limit to the density in the acceleration region. We also search for narrowband spikes at the start of the type III bursts. In about half of the observed cases we find metric spikes or enhancements of type I bursts associated with the start of the electron event. If interpreted as the plasma emission of the acceleration process, the observed average frequency of spikes suggests a source density of the order of 3 108 cm-3 consistent with the energy cut-off observed.

Authors: Arnold O. Benz, Robert P. Lin, Olga A. Sheiner, Säm Krucker and Joe Fainberg
Projects: None

Publication Status: Solar Physics 203, 131 -144 (2001)
Last Modified: 2005-11-21 03:32
Go to main E-Print page  Revisiting the Determination of the Coronal Heating Function from Yohkoh Data  On the reliability of peak-flux distributions, with an application to solar flares  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

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