Extreme ultraviolet observations from Voyager 1 encounter with Jupiter

Details Extreme ultraviolet observations from Voyager 1 encounter with Jupiter Extreme ultraviolet observations from Voyager 1 encounter with Jupiter

Jun 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979sci...204..979b&link_type=abstract

Science, vol. 204, June 1, 1979, p. 979-982.

Physics

176

Jupiter (Planet), Jupiter Atmosphere, Line Spectra, Ultraviolet Spectra, Voyager Project, Electron Energy, Equatorial Atmosphere, Flyby Missions, High Temperature Plasmas, Hydrogen Clouds, Light Curve, Natural Satellites, Planetary Magnetic Fields, Spatial Distribution, Ultraviolet Radiation, Occultations, Ultraviolet, Observations, Voyager 1, Jupiter, Spectrum, Optical Properties, Atmosphere, Satellites, Ganymede, Hydrogen, Torus, Emission, Electrons, Temperatures, Scattering, Io, Plasmas, Lyman-Alpha Radi

Scientific paper

Observations of the optical extreme ultraviolet spectrum of the Jupiter planetary system during the Voyager 1 encounter have revealed previously undetected physical processes of significant proportions. Bright emission lines of S(+2), S(+3), O(+2) indicating an electron temperature of 100,000 K have been identified in preliminary analyses of the Io plasma torus spectrum. Strong auroral atomic and molecular hydrogen emissions have been observed in the polar regions of Jupiter near magnetic field lines that map the torus into the atmosphere of Jupiter. The observed resonance scattering of solar hydrogen Lyman alpha by the atmosphere of Jupiter and the solar occultation experiment suggest a hot thermosphere (greater than or equal to 1000 K) with a large atomic hydrogen abundance. A stellar occultation by Ganymede indicates that its atmosphere is at most an exosphere.

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