Abstract
The Solar Electron Proton Telescope on board the twin STEREO spacecraft measures electrons and ions in the energy range from 30 to above 400 keV with an energy resolution better than 10%. On 22 February 2010 during a short interval of 100 minutes, a sequence of impulsive energetic electron events in the range below 120 keV was observed with the STEREO-A/SEPT instrument. Each of the four events was associated with a type III radio burst and a narrow EUV jet. All the events show nearly symmetric “spike”-like time profiles with very short durations ≃ 5 min. The estimated electron injection time for each individual event shows a small time delay between the electron spike and the corresponding type III radio emission and a close coincidence with an EUV jet. These observations reveal the existence of spike-like electron events showing nearly “scatter-free” propagation from the Sun to STEREO-A. From the time coincidence we infer that the mildly relativistic electrons are accelerated at the same time and at the same location as the accompanying type III emitting electrons and coronal EUV jets. The characteristics of the spikes reflect the injection and acceleration profiles in the corona rather than interplanetary propagation effects.
Energy Storage and Release through the Solar Activity Cycle – Models Meet Radio Observations Guest Editors: Christophe Marqué and Alexander Nindos.
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Klassen, A., Gómez-Herrero, R., Heber, B. (2011). Electron Spikes, Type III Radio Bursts and EUV Jets on 22 February 2010. In: Marqué, C., Nindos, A. (eds) Energy Storage and Release through the Solar Activity Cycle. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-4403-9_8
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