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Survey of Saturn Z-mode Emission

Menietti, J. D.; Averkamp, T. F.; Ye, Sheng-Yi; Horne, R. B.; Woodfield, E. E.; Shprits, Y. Y.; Gurnett, D. A.; Persoon, A. M.; Wahlund, J. E.. 2015 Survey of Saturn Z-mode Emission. Journal of Geophysical Research: Space Physics, 120 (8). 6176-6187. 10.1002/2015JA021426

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Abstract/Summary

Because of the role of Z-mode emission in the diffusive scattering and resonant acceleration of electrons, we conduct a survey of intensity in the Saturn inner magnetosphere. Z-mode is primarily observed as “5 kHz” narrowband emission in the lower density regions where the ratio of cyclotron to plasma frequency, fc/fp > 1 to which we limit this study. This occurs at Saturn along the inner edge of the Enceladus torus near the equator and at higher latitudes. We present profiles and parametric fits of intensity as a function of frequency, radius, latitude, and local time. The magnetic field intensity levels are lower than chorus, but the electric field intensities are comparable. We conclude that Z-mode wave-particle interactions may make a significant contribution to electron acceleration in the inner magnetosphere of Saturn, supplementing acceleration produced by chorus emission.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1002/2015JA021426
Programmes: BAS Programmes > BAS Programmes 2015 > Space Weather and Atmosphere
ISSN: 21699380
Additional Keywords: plasma waves and instabilities, wave/particle interactions, planetary megnetospheres, Z-mode at Saturn
Date made live: 22 Jul 2015 09:26 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/511355

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