Journal article
Auroral hiss, electron beams and standing Alfven wave currents near Saturn's moon Enceladus
Geophysical research letters, Vol.38(6), pp.np-n/a
03/2011
DOI: 10.1029/2011GL046854
Abstract
Observations from the Cassini spacecraft have shown that Saturn's small icy moon Enceladus ejects a plume of water vapor and small ice particles into Saturn's rapidly co-rotating magnetosphere. In this paper we show that the interaction of the moon with the magnetospheric plasma produces a number of electrodynamics effects that are remarkably similar to those observed in Earth's auroral regions and near Jupiter's moon Io. These include whistler-mode emissions similar to terrestrial auroral hiss, magnetic-field-aligned electron beams, and currents associated with a standing Alfven wave excited by the moon. Ray path analyses of the auroral hiss show that the electron beams responsible for the emissions are accelerated very close to the moon, most likely by parallel electric fields associated with the Alfven wave. However, other possibilities such as electric fields due to electrostatic charging of the moon's surface or of particles in the water vapor plume should be considered. Citation: Gurnett, D. A., et al. (2011), Auroral hiss, electron beams and standing Alfven wave currents near Saturn's moon Enceladus, Geophys. Res. Lett., 38, L06102, doi:10.1029/2011GL046854.
Details
- Title: Subtitle
- Auroral hiss, electron beams and standing Alfven wave currents near Saturn's moon Enceladus
- Creators
- D. A. Gurnett - University of IowaT. F. Averkamp - University of IowaP. Schippers - University of IowaA. M. Persoon - University of IowaG. B. Hospodarsky - University of IowaJ. S. Leisner - University of IowaW. S. Kurth - University of IowaG. H. Jones - University College LondonA. J. Coates - University College LondonF. J. Crary - Southwest Research InstituteM. K. Dougherty - Imperial College London
- Resource Type
- Journal article
- Publication Details
- Geophysical research letters, Vol.38(6), pp.np-n/a
- Publisher
- Amer Geophysical Union
- DOI
- 10.1029/2011GL046854
- ISSN
- 0094-8276
- eISSN
- 1944-8007
- Number of pages
- 4
- Grant note
- ST/I002642/1 / UK Space Agency PP/E001076/1 / STFC; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) 1415150; 1405851 / JPL STFC; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) ST/I00212X/1 / Science and Technology Facilities Council; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) UKSA
- Language
- English
- Date published
- 03/2011
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984455542402771
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