The effect of differential rotation on Jupiter's low-degree even gravity moments

Y. Kaspi, T. Guillot, E. Galanti, Y. Miguel, R. Helled, William B. Hubbard, B. Militzer, S. M. Wahl, S. Levin, J. E.P. Connerney, S. J. Bolton

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

The close-by orbits of the ongoing Juno mission allow measuring with unprecedented accuracy Jupiter's low-degree even gravity moments J2, J4, J6, and J8. These can be used to better determine Jupiter's internal density profile and constrain its core mass. Yet the largest unknown on these gravity moments comes from the effect of differential rotation, which gives a degree of freedom unaccounted for by internal structure models. Here considering a wide range of possible internal flow structures and dynamical considerations, we provide upper bounds to the effect of dynamics (differential rotation) on the low-degree gravity moments. In light of the recent Juno gravity measurements and their small uncertainties, this allows differentiating between the various models suggested for Jupiter's internal structure.

Original languageEnglish (US)
Pages (from-to)5960-5968
Number of pages9
JournalGeophysical Research Letters
Volume44
Issue number12
DOIs
StatePublished - Jun 28 2017

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Keywords

  • atmospheric dynamics
  • differential rotation
  • gravity
  • gravity moments
  • Juno
  • Jupiter

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

Kaspi, Y., Guillot, T., Galanti, E., Miguel, Y., Helled, R., Hubbard, W. B., Militzer, B., Wahl, S. M., Levin, S., Connerney, J. E. P., & Bolton, S. J. (2017). The effect of differential rotation on Jupiter's low-degree even gravity moments. Geophysical Research Letters, 44(12), 5960-5968. https://doi.org/10.1002/2017GL073629