Survey of Jupiter's Dawn Magnetosheath Using Juno

D. A. Ranquist, F. Bagenal, R. J. Wilson, G. Hospodarsky, R. W. Ebert, F. Allegrini, P. Valek, D. J. McComas, J. E.P. Connerney, W. S. Kurth, S. J. Bolton

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

The Juno spacecraft crossed Jupiter's bow shock and into the magnetosheath on 24 June 2016. It then went into 53-day polar orbits with its apojoves at 113 Jovian radii on Jupiter's dawn side. These orbits have given us a unique opportunity to survey Jupiter's dawn magnetosheath. Using data from the Jovian Auroral Distributions Experiment, the Magnetic Field Investigation, and the Waves Investigation, we have identified 91 magnetosheath crossings for a total of 48.2 days of data. We present the statistical properties of the magnetosheath plasma, including density, velocity, magnetic field strength, temperature, plasma beta, pressures, and Mach numbers. We then show correlations between these various parameters. We confirm the rotation of the magnetic field to align with Jupiter's spin axis and find that this rotation correlates with several of the plasma properties, including magnetic field strength and plasma flow velocity. Finally, we discuss how these results can affect magnetic reconnection and the Kelvin-Helmholtz instability at Jupiter's dawn magnetopause boundary.

Original languageEnglish (US)
Pages (from-to)9106-9123
Number of pages18
JournalJournal of Geophysical Research: Space Physics
Volume124
Issue number11
DOIs
StatePublished - Nov 1 2019

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Keywords

  • Juno
  • Jupiter
  • magnetosheath

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    Ranquist, D. A., Bagenal, F., Wilson, R. J., Hospodarsky, G., Ebert, R. W., Allegrini, F., Valek, P., McComas, D. J., Connerney, J. E. P., Kurth, W. S., & Bolton, S. J. (2019). Survey of Jupiter's Dawn Magnetosheath Using Juno. Journal of Geophysical Research: Space Physics, 124(11), 9106-9123. https://doi.org/10.1029/2019JA027382