Mathematics – Logic
Scientific paper
Sep 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....41.1624w&link_type=abstract
American Astronomical Society, DPS meeting #41, #16.24
Mathematics
Logic
Scientific paper
Jupiter's satellite Io is the most geologically dynamic solid body in the Solar System, including Earth. Io undergoes severe tidal heating, induced by the orbital eccentricity forced by Jupiter and the 4:2:1 Laplace resonance between Io, Europa, and Ganymede. Global heat flow is estimated at >2 W/sq. m, compared to the 0.06 W/sq. m average for Earth. This one remarkable number presages a huge variety of interconnected phenomena operating at a scale not seen active anywhere else in our Solar System. Io offers an extremely rich array of geophysical, geological, geochemical, atmospheric, and magnetospheric phenomena. Diurnal tidal flexing amplitudes may reach 100 meters, dissipating huge amounts of heat in the interior, and resulting in extensive volcanic activity. Lavas of poorly known composition inundate the surface, while volcanic plumes feed a tenuous, inhomogeneous atmosphere controlled by a combination of volcanic outgassing, the formation of surface frosts and the sublimation of these frosts. Complementing Io's pervasive volcanic landforms, the surface is studded with some of the Solar System's highest and most dramatic mountains, and by scarps of both tectonic and erosional origin. As one of the most spectacular places in the Solar System, Io has unique public appeal, and Io exploration offers many opportunities to attract and engage public interest in planetary science. This poster highlights the science goals established to advance scientific understanding of Io for the next decade. We give a series of recommendations to the Planetary Decadal Survey Large Satellites Panel to advance Io exploration, including concepts for future Discovery- and New Frontiers-class missions, and ground- and spaced-based telescopic observations and instruments.
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