Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Transient internally driven aurora at Jupiter discovered by Hisaki and the Hubble Space Telescope
AU - Kimura, T.
AU - Badman, S. V.
AU - Tao, C.
AU - Yoshioka, Kazuo
AU - Murakami, G.
AU - Yamazaki, A.
AU - Tsuchiya, F.
AU - Bonfond, B.
AU - Steffl, A. J.
AU - Masters, A.
AU - Kasahara, S.
AU - Hasegawa, H.
AU - Yoshikawa, I.
AU - Fujimoto, M.
AU - Clarke, J. T.
PY - 2015/3/25
Y1 - 2015/3/25
N2 - Jupiter's auroral emissions reveal energy transport and dissipation through the planet's giant magnetosphere. While the main auroral emission is internally driven by planetary rotation in the steady state, transient brightenings are generally thought to be triggered by compression by the external solar wind. Here we present evidence provided by the new Hisaki spacecraft and the Hubble Space Telescope that shows that such brightening of Jupiter's aurora can in fact be internally driven. The brightening has an excess power up to similar to 550 GW. Intense emission appears from the polar cap region down to latitudes around Io's footprint aurora, suggesting a rapid energy input into the polar region by the internal plasma circulation process.
AB - Jupiter's auroral emissions reveal energy transport and dissipation through the planet's giant magnetosphere. While the main auroral emission is internally driven by planetary rotation in the steady state, transient brightenings are generally thought to be triggered by compression by the external solar wind. Here we present evidence provided by the new Hisaki spacecraft and the Hubble Space Telescope that shows that such brightening of Jupiter's aurora can in fact be internally driven. The brightening has an excess power up to similar to 550 GW. Intense emission appears from the polar cap region down to latitudes around Io's footprint aurora, suggesting a rapid energy input into the polar region by the internal plasma circulation process.
KW - Jupiter
KW - aurora
KW - energetic event
KW - magnetosphere
KW - WIND-INDUCED COMPRESSIONS
KW - SOLAR-WIND
KW - MIDDLE MAGNETOSPHERE
KW - JOVIAN MAGNETOSPHERE
KW - EXPANSIONS
KW - MODULATION
KW - CURRENTS
KW - GALILEO
KW - PRECIPITATION
KW - MAGNETOTAIL
U2 - 10.1002/2015GL063272
DO - 10.1002/2015GL063272
M3 - Journal article
VL - 42
SP - 1662
EP - 1668
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 6
ER -