The spectra of near-relativistic solar energetic electron events: Imprints of acceleration and transport
Abstract
We have analyzed a large statistical sample of solar energetic electron events observed during 10 years with the STEREO mission. STEREO's Solar Electron and Proton Telescope (SEPT) provides 15 electron energy channels in the range from 45-425 keV which we employ to study the peak intensity spectra. Only 30% of the events show impulsive rise times smaller than 20 minutes. Out of the 781 events, 56% (44%) show a broken-power-law (single-power-law) shape in the energy range of SEPT. The mean break energy of the broken-power-law events of 120 keV is higher than those determined for samples of impulsive electron events and raises questions about the origin of the break. We will discuss the implications of the underlying acceleration process and the different transport effects which can affect the energy spectra.
- Publication:
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43rd COSPAR Scientific Assembly. Held 28 January - 4 February
- Pub Date:
- January 2021
- Bibcode:
- 2021cosp...43E1056D