Physics
Scientific paper
Sep 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997georl..24.2127k&link_type=abstract
Geophysical Research Letters, vol. 24, p. 2127
Physics
52
Magnetic Anomalies, Plasmas (Physics), Toroidal Plasmas, Extraterrestrial Environments, Magnetic Fields, Magnetic Measurement, Plasma Density, Magnetohydrodynamic Flow, Space Probes, Magnetometers
Scientific paper
On Galileo's inbound pass through the Io plasma torus in December 1995, we detected intermittent, short-duration increases in the magnetic field magnitude, notable by their abrupt onset and subsequent abrupt recovery to the previous level. The events were small and brief, with an average field change of 15.7 nT (1-2% of the background field) and an average duration of approximately 26 s. They were observed first shortly after data at high time resolution were first acquired at a radial distance of 7.7 RJ from Jupiter's center. The last and most clearly-defined signature, with exceptionally sharp boundaries, was observed at 6.03 RJ, about 12 minutes before closest approach to Io. The magnetic pressure change across the boundaries of these structures was approximately 10 to approximately 33 nPa, the latter value in a region with background plasma pressure of 60 nPa. Thus, although of small amplitude in the magnetic field, they represent large changes in the pressure. Abrupt changes in the measurements of the other fields and particles instruments correlate with some of the magnetic signatures. In this paper, we present the magnetometer data for these unusual signatures, discuss the limits on particle density changes that they imply, the significance of their spatial distribution, and their relationship to transport of plasma in the torus.
Galland Kivelson Margaret
Khurana Krishan K.
Russell Christopher T.
Walker Raymond J.
No associations
LandOfFree
Intermittent short-duration magnetic field anomalies in the Io torus: Evidence for plasma interchange? 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 Intermittent short-duration magnetic field anomalies in the Io torus: Evidence for plasma interchange?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intermittent short-duration magnetic field anomalies in the Io torus: Evidence for plasma interchange? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1226020