Bremen 2017 – scientific programme
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EP: Fachverband Extraterrestrische Physik
EP 5: Postersitzung I
EP 5.2: Poster
Tuesday, March 14, 2017, 16:30–18:00, GW2 2.OG
Long-lasting solar energetic electron injection during the 26 Dec 2013 widespread SEP event — •Nina Dresing1, Raúl Gómez-Herrero2, Bernd Heber1, Andreas Klassen1, Manuela Temmer3, and Astrid Veronig3 — 1IEAP, University of Kiel, Germany — 2SRG, Universidad de Alcalá, Spain — 3Institute of Physics, University of Graz, Austria
The solar energetic particle (SEP) event on 26 Dec 2013 was observed all around the Sun by the two STEREO spacecraft and close to Earth. A remarkable feature of the in-situ observations is the long-lasting anisotropy observed at all three viewpoints lasting for many hours at Wind and up to more than a day at STEREO B. Also the near-relativistic electron intensities show long-lasting rises over many hours. To explain such observations a temporally extended injection scenario is required which could be realized by the associated CME-driven shock. Because energetic electron events were previously assumed to be purely flare-ralated, it is important to characterize the possible role of shocks for solar energetic electrons. Especially in the context of widespread SEP events the role of efficient perpendicular transport vs. an extended source region is discussed controversially. We analyze remote-sensing and in-situ observations and discuss the role of the shock for the energetic electron event as well as its limitations.