New Results of Energetic Particle Observations In The Duskside Jovian Magnetosphere
Abstract
We report on new results from in-situ energetic particle measurements in the vicin- ity of Jupiter observed during the last year 2001 and the beginning of 2002 by the Energetic Particles Detector EPD onboard the Galileo spacecraft. We concentrate on so-called realtime data in and outside the Jovian magnetosphere from the outer dusk- side Jovian magnetosphere out the magnetopause location at about 100 planetary radii (RJ). EPD, which measures electrons (15-884 keV), ions (30-3200 keV) and protons (80-1250 keV), Helium (27-1000 keV/n), Oxygen (12-562 keV/n), and Sulfur (16-310 keV/n) ions separately, has the capability to derive energy spectra, relative ion compo- sition and angular distributions. This allows us to investigate relative ion composition, acceleration mechanisms and particle motion in regions of the Jovian magnetosphere where nearly no other data are available. Preliminary results show that the Jovian mag- netosphere at a local time of 1700 LT was very active and dynamic in early 2002 with very sharp boundary crossings around 80-100 RJ. The results will be discussed in the context of previous data sets at other local times and will be compared with MHD simulations
- Publication:
-
EGS General Assembly Conference Abstracts
- Pub Date:
- 2002
- Bibcode:
- 2002EGSGA..27.2855K