Other
Scientific paper
Apr 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004p%26ss...52..491t&link_type=abstract
Planetary and Space Science, Volume 52, Issue 5-6, p. 491-498.
Other
5
Auroral Phenomena, Energetic Particles, Jupiter'S Magnetosphere, Planetary Magnetospheres
Scientific paper
Based on 33 Galileo passages through the inner part of the Jovian magnetosphere, the properties of the energetic charged particle population are investigated. Pronounced changes in the particle intensities, and in their energy and pitch angle distributions (PADs) are generally observed. The good coverage in local time and radial distance provided by Galileo allowed to trace the location of the most distinct changes within the equatorial plane. Independent of local time they occur at distances between 10 and 30RJ. Within this region particle intensities drop by several orders of magnitude and the energy spectra softens considerably. However, most prominent is a change of the electron PAD from a pancake or trapped (maximum at 90°) to a distribution which maximises at different pitch angle values (bi-directional or butterfly distributions). The change occurs rapidly, usually within the time resolution of the measurements, giving rise to a sharp and distinct boundary. This boundary is located dependent on the orbit between 10 and 17RJ. It does not exhibit striking local time dependencies, specifically a pronounced dawn-dusk asymmetry, with the exception of the boundary being slightly closer to the planet near noon compared to the other local times. The change in the electron pitch angle distribution occurs in a region where the magnetic field topology is still close to a dipolar field configuration. The softening of the particle energy spectra is collocated with the transition of the magnetic field from a dipolar to a current sheet topology. Possible connections to and implications for the Jovian high-latitude aurora are addressed.
Dougherty K. M. K. M.
Glassmeier Karl-Heintz
Hanlon P. G.
Krupp Norbert
Lagg Andreas
No associations
LandOfFree
Changes of the energetic particles characteristics in the inner part of the Jovian magnetosphere: a topological study does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Changes of the energetic particles characteristics in the inner part of the Jovian magnetosphere: a topological study, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Changes of the energetic particles characteristics in the inner part of the Jovian magnetosphere: a topological study will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1461024