Juno observations of spot structures and a split tail in Io-induced aurorae on Jupiter

[en] Jupiter’s aurorae are produced in its upper atmosphere when incoming high-energy electrons precipitate along the planet's magnetic field lines. A northern and a southern main auroral oval are visible, surrounded by small emission features associated with the Galilean moons. We present infrared observations, obtained with the Juno spacecraft, showing that in the case of Io, this emission exhibits a swirling pattern that is similar in appearance to a von Kármán vortex street. Well downstream of the main auroral spots the extended tail is split in two. Both of Ganymede’s footprints also appear as a pair of emission features, which may provide a remote measure of Ganymede’s magnetosphere. These features suggest that magnetohydrodynamic interaction between Jupiter and its moon is more complex than previously anticipated. © The Author(s) 2017.

Research Center/Unit :

STAR - Space sciences, Technologies and Astrophysics Research - ULiège

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Mura, A.; Institute for Space Astrophysics and Planetology, National Institute for Astrophysics, Italy

Adriani, A.; Institute for Space Astrophysics and Planetology, National Institute for Astrophysics, Italy

Connerney, J. E. P.; Space Research Corporation, Annapolis, MD, USA, NASA Goddard Space Flight Center, USA

Bolton, S.; Southwest Research Institute, USA

Altieri, F.; Institute for Space Astrophysics and Planetology, National Institute for Astrophysics, Italy

Bagenal, F.; University of Colorado Boulder, USA

Bonfond, Bertrand ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)

Dinelli, B. M.; Institute of Atmospheric Sciences and Climate, National Research Council, Italy

Gérard, Jean-Claude ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)

Greathouse, T.; Southwest Research Institute, USA

More authors (20 more)

Language :

English

Title :

Juno observations of spot structures and a split tail in Io-induced aurorae on Jupiter

Publication date :

2018

Journal title :

Science

ISSN :

0036-8075

eISSN :

1095-9203

Publisher :

American Association for the Advancement of Science

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 15 January 2019

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