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

Menietti, J.D.; Horne, Richard B.; Gurnett, D.A.; Hospodarsky, G.B.; Piker, C.W.; Groene, J.B.. 2008 A survey of Galileo plasma wave instrument observations of Jovian whistler-mode chorus. Annales Geophysicae, 26 (7). 1819-1828. 10.5194/angeo-26-1819-2008

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Abstract/Summary

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 R-J. 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 degrees of the Jovigraphic equator, but the tilt of the magnetic field permits coverage of a range of magnetic latitudes of -13 degrees < lambda(mag) < +13 degrees. 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 R-J 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.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.5194/angeo-26-1819-2008
Programmes: BAS Programmes > Global Science in the Antarctic Context (2005-2009) > Sun Earth Connections
ISSN: 0992-7689
Additional Keywords: magnetospheric physics; energetic particles, trapped; planetary magnetospheres; space plasma physics; wave-particle interactions
NORA Subject Terms: Physics
Atmospheric Sciences
Space Sciences
Date made live: 18 Jan 2011 12:39
URI: http://nora.nerc.ac.uk/id/eprint/11566

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