Asymmetric distribution of reconnection jet fronts in the Jovian nightside magnetosphere

S. Kasahara, E. A. Kronberg, T. Kimura, C. Tao, S. V. Badman, A. Masters, A. Retinò, N. Krupp, M. Fujimoto

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Magnetic reconnection plays important roles in mass transport and energy conversion in planetary magnetospheres. It is considered that transient reconnection causes localized auroral arcs or spots in the Jovian magnetosphere, by analogy to the case in the Earth's magnetosphere. However, the local structures of transient reconnection events (i.e., magnetospheric plasma parameters) and their spatial distribution have not been extensively investigated for the Jovian magnetosphere. Here we examine plasma velocity and density during strong north-south magnetic field events in the Jovian nightside magnetosphere, which may be associated with tail reconnection. We find prominent reconnection jet fronts predominantly on the dawnside of the nightside magnetosphere, which would be a signature unique to rotation-dominant planetary magnetospheres. The observed plasma structures are consistent with significant field-aligned currents which would generate localized aurora.

Original languageEnglish
Pages (from-to)375-384
Number of pages10
JournalJournal of Geophysical Research: Space Physics
Volume118
Issue number1
DOIs
Publication statusPublished - 2013
Externally publishedYes

Keywords

  • Jovian magnetosphere
  • reconnection jet fronts

ASJC Scopus subject areas

  • 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

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    Kasahara, S., Kronberg, E. A., Kimura, T., Tao, C., Badman, S. V., Masters, A., Retinò, A., Krupp, N., & Fujimoto, M. (2013). Asymmetric distribution of reconnection jet fronts in the Jovian nightside magnetosphere. Journal of Geophysical Research: Space Physics, 118(1), 375-384. https://doi.org/10.1029/2012JA018130