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| Titel |
Electron spikes, type III radio bursts and EUVI jets on February 22, 2010 |
| VerfasserIn |
Andreas Klassen, Raúl Gómez-Herrero, Bernd Heber |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250055891
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| Zusammenfassung |
| The Solar Electron Proton Telescope (SEPT) aboard the twin STEREO spacecraft measures
electrons and ions in the energy range from 60 to above 400 keV with an energy resolution
better than 10%.
On February 22, 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 EUVI jet. All the events show nearly symmetric "spike"-like
time profiles with very short durations -ă 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 EUVI
jet.
These observations reveal 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 EUVI jets. The characteristics of
the spikes reflect the injection and acceleration profiles in the corona rather than the
interplanetary propagation effects. |
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