Regensburg 2007 – wissenschaftliches Programm
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EP: Fachverband Extraterrestrische Physik
EP 7: Solar-Terrestrische Beziehungen
EP 7.9: Vortrag
Dienstag, 27. März 2007, 18:30–18:45, H46
Acceleration and Transport of Energetic Particles in the 20 January 2005 Solar Event — •Wolfgang Droege1,2, Bernd Heber1, Andreas Klassen1, Christian Steigies1, Manfred Thomann1, and Julia Kartavykh3 — 1Institut für Experimentelle und Angewandte Physik, Universität Kiel, Leibnizstr. 11, 24098 Kiel — 2Institut für Theoretische Physik und Astrophysik, Universität Würzburg, D-97074 Würzburg — 3Ioffe Physical-Technical Institute, St. Petersburg 194021, Russia
The 20 January 2005 solar event produced one of the hardest spectra of accelerated particles in space, and was accompanied by the largest flare ever observed. We model the fluxes of interplanetary particles observed on Wind, SOHO, Ulysses, and neutron monitors, and reconstruct their injection time histories and energy spectra. We compare our results with gamma-ray signatures of particles accelerated in the associated flare and discuss the question whether the two populations or parts of them origin in the same acceleration process. An understanding of a possible flare contribution to interplanetary particle fluxes in the 20 January 2005 event, which was one of the best observed events with modern instruments, might provide new insights into the acceleration of high-energy particles at the Sun and their transport in the Heliosphere.