Greifswald 2024 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 7: Sun and Heliosphere II

EP 7.5: Vortrag

Donnerstag, 29. Februar 2024, 15:00–15:15, ELP 6: HS 2

Measurements of ultra-relativistic electrons during solar energetic particle events - Results from the Ulysses Kiel Electron Telescope — •Carlotta Jöhnk, Bernd Heber, and Marlon Köberle — Christian-Albrechts-Universität zu Kiel, Germany

Solar energetic particle (SEP) events are increases of ions and electrons caused by solar activity namely flares and coronal mass ejections. While the most energetic ion population is well studied, SEP events accelerating electrons above 20 MeV have only been reported from measurements by ISEE III in the 1980s and the Kiel Electron Telescope (KET).

The KET aboard Ulysses launched in 1990 and measured the electron flux in the energy range from 4 MeV to above 6 GeV. Here we report on observations of ultra-relativistic electrons and show spectra of electron events during solar cycle 22 and 23 until the end of 2008. The maximum electron energy exceeded 100 MeV during the August 16, 2001 SEP event.

Keywords: Solar energetic particles; Electrons; Ulysses