Other
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm41b1676m&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SM41B-1676
Other
2407 Auroral Ionosphere (2704), 2736 Magnetosphere/Ionosphere Interactions (2431), 2756 Planetary Magnetospheres (5443, 5737, 6033), 5706 Aurorae, 5737 Magnetospheres (2756)
Scientific paper
The Juno mission, a Jupiter polar orbiting program that begins its 1-year mission at Jupiter in 2016, resolves critical questions regarding the processes that drive Jupiter's dramatic aurora and tests the universality of the processes that generate aurora and couple magnetized planets to their space environments. Jupiter's magnetosphere is known to be powered very differently than is Earth's, specifically by strong planetary rotation rather than by the interplanetary environment controlled by the solar wind. And yet, we see hints that some of the fundamental processes that drive Jupiter's aurora are the same as those that drive Earth's aurora. Is the global aurora regulated by a global pattern of electric currents that connects Jupiter's magnetosphere to its polar ionosphere along magnetic field lines? Does particle acceleration occur as a result of the scarcity of field-aligned current carriers, and where does the acceleration occur? Are the dominant acceleration processes the same as those that dominate at Earth or do other processes prevail? How do the auroral processes that generate emissions modify the energy and momentum coupling between the magnetosphere and ionosphere? Juno addresses and answers these and other critical questions by flying a capable suite of in situ particles and fields magnetospheric instruments through Jupiter's low-altitude polar regions, and combining those measurements with UV and IR imaging of the polar auroral displays. Here we review the critical issues and questions regarding Jupiter's aurora that Juno addresses, and show how they are resolve by the Juno mission and instruments.
Bagenal Fran
Mauk Barry H.
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