Journal article
Chorus, ECH, and Z mode emissions observed at Jupiter and Saturn and possible electron acceleration
Journal of geophysical research. Space physics, Vol.117(A12), A12214
12/2012
DOI: 10.1029/2012JA018187
Abstract
In this paper we compare and contrast chorus, electron cyclotron harmonics (ECH), and Z mode emissions observed at Jupiter and Saturn and relate them to recent work on electron acceleration at Earth. Intense chorus emissions are observed near the magnetic equator, the likely source region, but the strongest intensities are on either side of the magnetic equator. Chorus intensities at Jupiter are generally about an order of magnitude larger than at Saturn, and the bandwidth of chorus at Jupiter can reach 7 or 8 kHz (similar to 0.6 f(c)), while at Saturn it is typically <2 kHz (similar to 0.6 f(c), also). No higher-latitude information is available at Jupiter; however, high inclination orbits at Saturn by Cassini reveal strong chorus intensities at latitudes extending to over 30 degrees. At Jupiter, initial studies reveal the chorus intensities are sufficient to accelerate electrons by a stochastic process; however, the high density levels near the source region of chorus at Saturn indicate a less efficient process except for local regions such as within plasma injection regions. The role of Z mode in electron acceleration and the role of ECH waves in pitch angle scattering at both Jupiter and Saturn require further study. Citation: Menietti, J. D., Y. Y. Shprits, R. B. Horne, E. E. Woodfield, G. B. Hospodarsky, and D. A. Gurnett (2012), Chorus, ECH, and Z mode emissions observed at Jupiter and Saturn and possible electron acceleration, J. Geophys. Res., 117, A12214, doi: 10.1029/2012JA018187.
Details
- Title: Subtitle
- Chorus, ECH, and Z mode emissions observed at Jupiter and Saturn and possible electron acceleration
- Creators
- J. D. Menietti - Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USAY. Y. Shprits - Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90024 USAR. B. Horne - British Antarctic SurveyE. E. Woodfield - British Antarctic SurveyG. B. Hospodarsky - Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USAD. A. Gurnett - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of geophysical research. Space physics, Vol.117(A12), A12214
- Publisher
- Amer Geophysical Union
- DOI
- 10.1029/2012JA018187
- ISSN
- 2169-9380
- eISSN
- 2169-9402
- Number of pages
- 17
- Grant note
- bas0100023 / NERC; UK Research & Innovation (UKRI); Natural Environment Research Council (NERC) NERC; UK Research & Innovation (UKRI); Natural Environment Research Council (NERC) ST/I001727/1 / Science and Technology Facilities Council; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) NNX11AM36G; NNX09AF51G; NNX10AK99G / NASA; National Aeronautics & Space Administration (NASA) 1415150 / JPL bas0100023 / Natural Environment Research Council; UK Research & Innovation (UKRI); Natural Environment Research Council (NERC) ST/I001727/1 / STFC; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC)
- Language
- English
- Date published
- 12/2012
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984455540902771
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