Transient aurora on Jupiter from injections of magnetospheric electrons

B. H. Mauk (), J. T. Clarke, D. Grodent, J. H. Waite, C. P. Paranicas and D. J. Williams
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B. H. Mauk: The Johns Hopkins University Applied Physics Laboratory
J. T. Clarke: Boston University
D. Grodent: Oceanic, and Space Sciences, University of Michigan
J. H. Waite: Oceanic, and Space Sciences, University of Michigan
C. P. Paranicas: The Johns Hopkins University Applied Physics Laboratory
D. J. Williams: The Johns Hopkins University Applied Physics Laboratory

Nature, 2002, vol. 415, issue 6875, 1003-1005

Abstract: Abstract Energetic electrons and ions that are trapped in Earth's magnetosphere can suddenly be accelerated towards the planet1,2,3,4,5. Some dynamic features of Earth's aurora (the northern and southern lights) are created by the fraction of these injected particles that travels along magnetic field lines and hits the upper atmosphere4. Jupiter's aurora appears similar to Earth's in some respects; both appear as large ovals circling the poles and both show transient events6,7,8,9,10,11. But the magnetospheres of Jupiter and Earth are so different—particularly in the way they are powered—that it is not known whether the magnetospheric drivers12 of Earth's aurora also cause them on Jupiter. Here we show a direct relationship between Earth-like injections of electrons in Jupiter's magnetosphere and a transient auroral feature in Jupiter's polar region. This relationship is remarkably similar to what happens at Earth, and therefore suggests that despite the large differences between planetary magnetospheres, some processes that generate aurorae are the same throughout the Solar System.

Date: 2002
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DOI: 10.1038/4151003a

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