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EP: Fachverband Extraterrestrische Physik

EP 11: Heliosphäre

EP 11.4: Talk

Thursday, March 29, 2007, 10:30–10:45, H46

The Interplanetary Propagation Of Jovian Electrons — •Phillip Dunzlaff, Bernd Heber, Oliver Sternal, Reinhold Müller-Mellin, and Raul Gomez Herrero — Institut für Experimentelle und Angewandte Physik, Leibnizstrasse 11, 24118 Kiel, Germany

Since the early 1970's the Jovian magnetopshere is known as a steady source of relativistic electrons with energies of about 3-30 MeV. Since Jupiter can be treated as a point source, which is not central w.r.t the interplanetary magnetic field, it gives us the unique opportunity to study the propagation of MeV-electrons.

Observations of Jovian electrons by the COSPIN/KET-instrument aboard Ulysses confirmed earlier in-ecliptic results, that Corotating Interactions Regions act as effective barriers for MeV-electrons. In 2003 Ulysses approached the planet again at a distance of 0.8 AU.

In this contribution we compare the results from the first Jovian encounter with the one obtained during the second distance encounter. Especially the latitudinal dependence of Corotaing Interaction Region effects will be presented.