Whistler mode noise in Jupiter's inner magnetosphere

Details Whistler mode noise in Jupiter's inner magnetosphere Whistler mode noise in Jupiter's inner magnetosphere

Jul 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.3151s&link_type=abstract

Journal of Geophysical Research, vol. 83, July 1, 1978, p. 3151-3165.

Physics

6

Energetic Particles, Jupiter Atmosphere, Noise Spectra, Planetary Magnetospheres, Whistlers, Electron Energy, Ionospheric Electron Density, Magnetically Trapped Particles, Pioneer 10 Space Probe, Pioneer 11 Space Probe, Pitch (Inclination), Propagation Modes, Thermal Plasmas, Jupiter, Magnetosphere, Pioneer 10, Pioneer 11, Spectrum, Plasmas, Electrons, Radial Distribution, Whistlers, Radioemissions, Particle Interactions

Scientific paper

A study is made of the amplitude and spectral extent of whistler mode noise in the inner magnetosphere of Jupiter. It is found that the 'hat-shaped' pitch angle distributions of energetic electrons (21 and 31 MeV at L=3) are consistent with those predicted in the presence of a band-limited spectrum of whistler mode noise. The equatorial maximum linear growth rate of parallel propagating whistlers are consistent with those necessary to limit the energetic electron intensities by the whistler mode instability. It is noted that the wave phase speeds before wave reflection can occur at high latitudes and that wave growth is limited to a disk-like region centered around the magnetic equator. The frequency extent of the whistler mode noise spectrum may be estimated by the range of frequencies maximally unstable to equatorial linear growth. A value is found for the spectral density of the broadband whistler mode noise necessary to balance radial diffusion of energetic electrons above the critical range, and an expression is derived for the energetic electron system response to fluctuations about the limiting flux value.

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