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EP: Extraterrestrische Physik

EP 8: Poster-1

EP 8.6: Poster

Montag, 8. März 2004, 17:45–19:30, Foyer

Ulysses COSPIN/KET observations of Jovian electrons in the 3-dimensional heliosphere — •H. Kunow¹, B. Heber², R. Müller-Mellin¹, G. Wibberenz¹, H. Fichtner³, S. E. S. Ferreira⁴, and M. S. Potgieter⁴ — ¹IEAP CAU Kiel, 24118 Kiel, Germany — ²FB Physik, Universität Osnabrück, Germany — ³TP4, Ruhr-Universität Bochum, Bochum, Germany — ⁴Unit for Space Physics, Potchefstroom University, Potchefstroom, South Africa

One of the fundamental problems in modern astrophysics is the propagation of cosmic rays in turbulent magnetic fields, which can be studied by way of in-situ measurements of energetic particles in the heliosphere. Measurements of 3-20 MeV electrons from 1990 to 2004 have been made in the inner three-dimensional heliosphere by the Kiel Electron Telescope (KET) onboard the Ulysses spacecraft. The Ulysses trajectory provides a unique opportunity to study the propagation of these electrons in a wide range of heliographic latitudes and during varying conditions. In order to interpret these measurements, it is necessary to know their origin and investigate their propagation, by using sophisticated particle propagation models. Between 1 and 10 AU Jovian, solar and galactic particles contribute to the few-MeV electron intensities. In this presentation we will emphasize on the recent Ulysses KET results. At solar maximum Jovian electrons could unambiguously be identified from heliographic latitudes beyond 40^∘ N and ∼10 AU from the planet, implying an efficient (latitude) transport of these particles.