Journal ArticleDOI
Io on the eve of the galileo mission
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TLDR
Io, the innermost of Jupiter's large moons, is one of the most unusual objects in the Solar System as discussed by the authors, which produces a global heat flux 40 times the terrestrial value, producing intense volcanic activity and a global resurfacing rate averaging perhaps 1 cm yr−1.Abstract:
▪ Abstract Io, innermost of Jupiter's large moons, is one of the most unusual objects in the Solar System. Tidal heating of the interior produces a global heat flux 40 times the terrestrial value, producing intense volcanic activity and a global resurfacing rate averaging perhaps 1 cm yr−1. The volcanoes may erupt mostly silicate lavas, but the uppermost surface is dominated by sulfur compounds including SO2 frost. The volcanoes and frost support a thin, patchy SO2 atmosphere with peak pressure near 10−8 bars. Self-sustaining bombardment of the surface and atmosphere by Io-derived plasma trapped in Jupiter's magnetosphere causes escape of material from Io (predominantly sulfur, oxygen, and sodium atoms, ions, and molecules) at a rate of about 103 kg s−1. The resulting Jupiter-encircling torus of ionized sulfur and oxygen dominates the Jovian magnetosphere and, together with an extended cloud of neutral sodium, is readily observable from Earth.read more
Citations
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A multi-emission imaging study of the Io plasma torus
Michael Küppers,Klaus Jockers +1 more
TL;DR: In this article, the Max-Planck-Institut fur Aeronomie attached to the 2.2m telescope at the European Southern Observatory was used to image the Io torus.
Journal ArticleDOI
Detection of Atomic Chlorine in Io’s Atmosphere with the Hubble Space Telescope GHRS
TL;DR: In this paper, the detection of atomic chlorine emissions in the atmosphere of Io using the Hubble Space Telescope observations with the Goddard High Resolution Spectrograph (GHRS) was reported.
Journal ArticleDOI
Resemblance and difference between the constitution of the Moon and Io
O. L. Kuskov,V. A. Kronrod +1 more
TL;DR: In this article, the authors compared the properties of the Moon and Io based on the geophysical (the seismic velocities, the mass and moment of inertia) and geochemical (chemical and phase composition) constraints.
Journal ArticleDOI
High‐resolution far ultraviolet spectrum of electron‐excited SO2
TL;DR: The high resolution UV capabilities of the Hubble Space Telscope (HST) equipped with the Space Telescope Imaging Spectrograph (STIS) reflect a need for high resolution laboratory UV spectral data base for comparison with observation as discussed by the authors.
Journal ArticleDOI
Mutual Event Observations of Io’s Sodium Corona
M. H. Burger,Nicholas M. Schneider,I. de Pater,Michael E. Brown,Antonin Bouchez,Laurence M. Trafton,Yaron Sheffer,Edwin S. Barker,A. Mallama +8 more
TL;DR: In this article, column density profiles of Io's sodium corona using 10 mutual eclipses between the Galilean satellites were measured and compared with profiles measured in 1991 and 1985, finding that there has been no significant variation.
References
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Journal ArticleDOI
Extreme ultraviolet observations from Voyager 1 encounter with Jupiter
A. L. Broadfoot,M. J. S. Belton,P. Z. Takacs,Bill R. Sandel,Donald E. Shemansky,Jay B. Holberg,Joseph M. Ajello,Sushil K. Atreya,Thomas M. Donahue,H. W. Moos,Jean-Loup Bertaux,J. E. Blamont,Darrell F. Strobel,John C. McConnell,Alexander Dalgarno,Richard Goody,Michael B. McElroy +16 more
TL;DR: The observed resonance scattering of solar hydrogen Lyman α by the atmosphere of Jupiter and the solar occultation experiment suggest a hot thermosphere (≥ 1000 K) wvith a large atomic hydrogen abundance.
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Melting of Io by Tidal Dissipation
TL;DR: The dissipation of tidal energy in Jupiter's satellite Io is likely to have melted a major fraction of the mass, and consequences of a largely molten interior may be evident in pictures of Io's surface returned by Voyager I.
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Inertial limit on corotation
TL;DR: In this article, the inertial corotation lag is calculated as a function of radial distance in the magnetosphere, the solution being parameterized in terms of the Pedersen conductivity of the atmosphere and the rate at which plasma mass is produced and transported outward.
Journal ArticleDOI
Physics of the Jovian Magnetosphere
TL;DR: In this paper, the authors considered the physics of magnetospheric radio emissions, plasma waves in the Jovian magnetosphere, theories of radio emissions and plasma waves, and magnetosphere models.