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Poynting fluxes, field-aligned current densities, and the efficiency of the Io-Jupiter electrodynamic interaction
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  • Ali H. Sulaiman,
  • Jamey R. Szalay,
  • George Clark,
  • Frederic Allegrini,
  • Fran Bagenal,
  • Martin Brennan,
  • John E. P. Connerney,
  • Vincent Hue,
  • William S Kurth,
  • Robert Louis Lysak,
  • Jonathan D. Nichols,
  • Joachim Saur,
  • Scott J Bolton
Ali H. Sulaiman
University of Minnesota

Corresponding Author:asulai@umn.edu

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Jamey R. Szalay
Princeton University
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George Clark
Johns Hopkins University Applied Physics Laboratory
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Frederic Allegrini
Southwest Research Institute
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Fran Bagenal
University of Colorado Boulder
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Martin Brennan
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John E. P. Connerney
NASA Goddard Space Flight Center
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Vincent Hue
Laboratoire d'Astrophysique de Marseille
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William S Kurth
University of Iowa
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Robert Louis Lysak
Univerity of Minnesota
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Jonathan D. Nichols
University of Leicester
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Joachim Saur
University of Cologne
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Scott J Bolton
Southwest Research Institute
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Juno’s highly inclined orbits provide opportunities to sample high-latitude magnetic field lines connected to the orbit of Io, among the other Galilean satellites. Its payload offers both remote-sensing and in-situ measurements of the Io-Jupiter interaction. These are at discrete points along Io’s footprint tail and at least one event (PJ12N) was confirmed to be on a flux tube directly connecting to Io, allowing for an investigation of how the interaction evolves down-tail. Here we present estimated Alfvén Poynting fluxes and field-aligned current densities along field lines connected to Io and its orbit. We explore their dependence as a function of down-tail distance and show the expected decay as seen in UV brightness and electron energy fluxes. We show that the Alfvén Poynting and electron energy fluxes are highly correlated and related by an efficiency that is fully consistent with acceleration from Alfvén wave filamentation via a turbulent cascade process.
28 Feb 2023Submitted to ESS Open Archive
01 Mar 2023Published in ESS Open Archive