General Earth and Planetary Sciences; Geophysics; Ganymede , Jupiter , Juno, footprint, flux tube, electron beam
Abstract :
[en] Jupiter's satellite auroral footprints are a manifestation of the satellite-magnetosphere interaction of the Galilean moons. Juno's polar elliptical orbit enables crossing the magnetic flux tubes connecting each Galilean moon with their associated auroral emission. Its payload allows measuring the fields and particle population in the flux tubes while remotely sensing their associated auroral emissions. During its thirtieth perijove, Juno crossed the flux tube directly connected to Ganymede's leading footprint spot, a unique event in the entire Juno prime mission. Juno revealed a highly-structured precipitating electron flux, up to 316 mW/m 2, while measuring both a small perturbation in the magnetic field azimuthal component and small Poynting flux with an estimated total downward current of 4.2 ± 1.2 kA. Based on the evolution of the footprint morphology and the field and particle measurements, Juno transited for the first time through a region connected to the transhemispheric electron beam of the Ganymede footprint.
Research Center/Unit :
STAR - Space sciences, Technologies and Astrophysics Research - ULiège
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Hue, V. ; Southwest Research Institute San Antonio TX USA
Szalay, J. R. ; Department of Astrophysical Sciences Princeton University Princeton NJ USA
Greathouse, T. K. ; Southwest Research Institute San Antonio TX USA
Bonfond, Bertrand ; Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR)
Kotsiaros, S. ; National Space Institute Measurement and Instrumentation Systems DTU Kongens Lyngby Denmark
Louis, C. K. ; School of Cosmic Physics DIAS Dunsink Observatory Dublin Institute for Advanced Studies Dublin Ireland
Sulaiman, A. H. ; Department of Physics and Astronomy University of Iowa Iowa City IA USA
Clark, G. ; Johns Hopkins University Applied Physics Laboratory Laurel MD USA
Allegrini, F.; Southwest Research Institute San Antonio TX USA ; University of Texas at San Antonio San Antonio TX USA
Gladstone, G. R. ; Southwest Research Institute San Antonio TX USA ; University of Texas at San Antonio San Antonio TX USA
Paranicas, C. ; Johns Hopkins University Applied Physics Laboratory Laurel MD USA
Versteeg, M. H. ; Southwest Research Institute San Antonio TX USA
Mura, A. ; Institute for Space Astrophysics and Planetology National Institute for Astrophysics Rome Italy
Moirano, A. ; Institute for Space Astrophysics and Planetology National Institute for Astrophysics Rome Italy
Gershman, D. J. ; NASA Goddard Spaceflight Center Greenbelt MD USA
Bolton, S. J.; Southwest Research Institute San Antonio TX USA
Connerney, J. E. P. ; NASA Goddard Spaceflight Center Greenbelt MD USA ; Space Research Corporation Annapolis MD USA
Davis, M. W. ; Southwest Research Institute San Antonio TX USA
Ebert, R. W. ; Southwest Research Institute San Antonio TX USA ; University of Texas at San Antonio San Antonio TX USA
Gérard, Jean-Claude ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO)
Giles, R. S. ; Southwest Research Institute San Antonio TX USA
Grodent, Denis ; Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR)
Imai, M. ; Department of Electrical Engineering and Information Science National Institute of Technology (KOSEN) Niihama College Niihama Japan
Kammer, J. A. ; Southwest Research Institute San Antonio TX USA
Kurth, W. S. ; Department of Physics and Astronomy University of Iowa Iowa City IA USA
Lamy, L. ; LESIA, Observatoire de Paris Université PSL CNRS Sorbonne Université Université de Paris Meudon France ; LAM, Pythéas Aix Marseille Université CNRS CNES Marseille France
Mauk, B. H. ; Johns Hopkins University Applied Physics Laboratory Laurel MD USA
BELSPO - Belgian Science Policy Office JSPS - Japan Society for the Promotion of Science SFI - Science Foundation Ireland UI - University of Iowa F.R.S.-FNRS - Fonds de la Recherche Scientifique
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