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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 26, issue 7
Ann. Geophys., 26, 1819–1828, 2008
https://doi.org/10.5194/angeo-26-1819-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 26, 1819–1828, 2008
https://doi.org/10.5194/angeo-26-1819-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.

  01 Jul 2008

01 Jul 2008

A survey of Galileo plasma wave instrument observations of Jovian whistler-mode chorus

J. D. Menietti1, R. B. Horne2, D. A. Gurnett1, G. B. Hospodarsky1, C. W. Piker1, and J. B. Groene1 J. D. Menietti et al.
  • 1University of Iowa, Dept. Physics and Astronomy, Iowa City, IA 52242-1479, USA
  • 2British Antarctic Survey, Madingley Road, Cambridge CB3 0ET, UK

Abstract. A survey of plasma wave observations at Jupiter obtained by the plasma wave instrument on board the Galileo spacecraft is presented. The observations indicate that chorus emissions are observed commonly in the Jovian magnetosphere near the magnetic equator in the approximate radial range 6<r<10 RJ. The survey includes almost all local times but not equally sampled in radial distance due to the spacecraft trajectory. The data suggest that chorus emissions are somewhat more intense on the dayside, but this may be a result of insufficient nightside observations. The orbit of Galileo is also restricted to ±3° of the Jovigraphic equator, but the tilt of the magnetic field permits coverage of a range of magnetic latitudes of −13°<λmag<+13°. The similarities of chorus emissions to terrestrial observations are a good reason to speculate that Jovian chorus emission may play a significant role in the stochastic acceleration of electrons in the radial range 6–10 RJ as recent studies indicate. These electrons may then be transported inward by radial diffusion where they are additionally accelerated to form the synchrotron radiation belt source.

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