Detection of a hot plasma component within the core regions of Jupiter's distant magnetotail

Details Detection of a hot plasma component within the core regions of Jupiter's distant magnetotail Detection of a hot plasma component within the core regions of Jupiter's distant magnetotail

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....92.9943s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, Sept. 1, 1987, p. 9943-9948.

Physics

9

Geomagnetic Tail, High Temperature Plasmas, Jupiter Atmosphere, Planetary Magnetic Fields, Plasma Diagnostics, Magnetic Field Configurations, Spaceborne Experiments, Voyager 2 Spacecraft, Jupiter, Magnetotail, Temperature, Spacecraft Observations, Pls Instrument, Mag Instrument, Voyager 2 Mission, Magnetic Fields, Lecp Instrument, Ions, Flux, Density, Pressure, Parameters, Plasma, Flow, Position (Location), Plasma Sheets, Diagrams, Spectra, Source

Scientific paper

Voyager-2 PLS low-energy plasma data and the magnetometer data are combined with the the LECP ion data (E greater than 28 keV) for the distant magnetotail observations (R = 5000-9000 Jupiter radii). A definite enhancement of LECP fluxes within the core regions (where the PLS densities and magnetic-field pressure are lower than in the surrounding regions) is shown, indicating that this hot tenuous plasma is present within the core regions. In general there is a strong anticorrelation between PLS density and LECP fluxes, while a less pronounced anticorrelation between magnetic-field pressure and LECP fluxes is observed. Estimates of LECP pressures suggest that this hot plasma can provide the previously described missing pressure in the core if heavy ions dominate the ion composition. The angular dependence of the LECP data indicates a flow of this hot plasma in the anti-Jupiter direction. This outflowing plasma could be the remnant of the magnetospheric wind observed near Jupiter by LECP. On the basis of this preliminary study, the core regions are found to have similarities to a plasma sheet.

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