The hot plasma environment at Jupiter - ULYSSES results

Details The hot plasma environment at Jupiter - ULYSSES results The hot plasma environment at Jupiter - ULYSSES results

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992sci...257.1518l&link_type=abstract

Science (ISSN 0036-8075), vol. 257, no. 5076, Sept. 11, 1992, p. 1518-1524. Research supported by NASA.

Computer Science

53

Auroras, Flyby Missions, High Temperature Plasmas, Jupiter (Planet), Planetary Magnetospheres, Space Plasmas, Ulysses Mission, Heavy Ions, Helium, Magnetopause, Oxygen, Sodium, Sulfur, Voyager Project

Scientific paper

Initial results obtained from measurements made by the HI-SCALE (heliosphere instrument for spectra, composition, and anisotropy at low energies) experiment are reported. Data revealed that the Jovian magnetosphere is very extended, with the day-side magnetopause located at about 105 Jupiter radii. The relative abundances of sulfur, oxygen, and sodium to helium decreased with the decreasing radial distance from the planet on the day-side, which suggests that the abundances of Jupiter-derived species are dependent on latitude. Intense fluxes of counter-streaming ions and electrons were discovered in the dusk-side, high-latitude region from the edge of the plasma sheet to the dusk-side magnetopause. These beams of ions and electrons appeared to be very tightly aligned with the magnetic field and to be superimposed on a time- and space variable isotropic hot plasma background. The current carried by measured hot plasma particles are about 1.6 x 10 exp -4 microamps per sq m.

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