Ions of Jovian origin observed by Voyager 1 and 2 in interplanetary space

Details Ions of Jovian origin observed by Voyager 1 and 2 in interplanetary space Ions of Jovian origin observed by Voyager 1 and 2 in interplanetary space

Jun 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980georl...7..453z&link_type=abstract

Geophysical Research Letters, vol. 7, June 1980, p. 453-456. Research sponsored by the U.S. Department of Energy;

Physics

2

Interplanetary Medium, Ion Density (Concentration), Jupiter (Planet), Planetary Radiation, Spacecraft Instruments, Voyager Project, Anisotropy, Bursts, Energetic Particles, Energy Spectra, Jupiter, Ions, Origin, Observations, Voyager 1, Voyager 2, Flux, Lecp, Bursts, Distance, Anisotropy, Spectrum, Energy, Particles, Flow, Imf, Magnetic Fields, Bow Shock, Data, Characteristics, Abundance

Scientific paper

Burst-like and long-lived ion fluxes (E greater than 30 keV) of Jovian origin have been observed in interplanetary space by the LECP instrument on the Voyager 1 and 2 spacecraft. Burst (few minute duration) events are observed at distances greater than 0.6 AU from Jupiter. These events are highly anisotropic and possess steep energy spectra, while long-lived (greater than 8 hour duration) events have relatively steady fluxes at low energies, strong anisotropies that decay with time, and a variable high energy component. Both types of events usually display simultaneous onsets and sharp cutoffs for all energies, an excess of atomic number Z not less than 6 particles compared to solar and interplanetary events, and particle flow directions pointed away from Jupiter along the local interplanetary magnetic field. The origin for the long-lived events appears to be inside the bow shock of the planet.

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