Physics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm44a..02m&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SM44A-02
Physics
2152 Pickup Ions, 2744 Magnetotail, 5737 Magnetospheres (2756), 5794 Instruments And Techniques, 6220 Jupiter
Scientific paper
New Horizons observed the unexplored, distant Jovian magnetotail to > 2500 RJ. A high-temperature, multi-species population of energetic particles is characteristic of regions closer to the planet. Velocity dispersions, anisotropies, and compositional variation seen in the deep-tail (> ~500 RJ) with a ~3- day periodicity suggest similar events that were observed at ~100 RJ in Galileo data. The signatures suggest plasma streaming away from the planet and injection sites in the near-tail region (~200 to 400 RJ) that could be related to magnetic reconnection events. The observed tail structure remains coherent at least as far as the first outbound crossing into the magnetosheath. Preliminary estimates suggest that this hot plasma population is sufficient to balance the pressure of the interplanetary magnetic field to this distance, maintaining the magnetotail structure.
Alan Stern S.
Bagenal Fran
Brown Lawrence E.
Elliott Heather Alison
Gurnee Reid S.
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