Journal article
Enceladus auroral hiss observations: Implications for electron beam locations
Journal of geophysical research. Space physics, Vol.118(1), pp.160-166
01/01/2013
DOI: 10.1029/2012JA018213
Abstract
The Cassini spacecraft has made 20 close flybys of the icy moon Enceladus between its arrival at Saturn in 2004 and 2012. Of those 20, strong whistler mode emissions (often called auroral hiss) were clearly observed on seven encounters. The propagation paths of these emissions are determined by the background magnetic field, which allows their source regions to be studied using simple ray-tracing codes. In this paper, we trace the auroral hiss observations from Cassini's trajectories to possible source locations near Enceladus. We find that all of the detected emissions could be generated by field-aligned electron beams in one of two regions around the moon: upstream of the Saturnward terminator and downstream of the anti-Saturnward terminator. These results suggest that electron beam acceleration near the solid body is a quasi-time-stationary feature of the plasma interaction and that the auroral hiss generated by these beams may be used to remotely study plasma processes in regions separated from the spacecraft. Citation: Leisner, J. S., G. B. Hospodarsky, and D. A. Gurnett (2013), Enceladus auroral hiss observations: Implications for electron beam locations, J. Geophys. Res. Space Physics, 118, 160-166, doi:10.1029/2012JA018213.
Details
- Title: Subtitle
- Enceladus auroral hiss observations: Implications for electron beam locations
- Creators
- J. S. Leisner - University of IowaG. B. Hospodarsky - University of IowaD. A. Gurnett - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of geophysical research. Space physics, Vol.118(1), pp.160-166
- Publisher
- Amer Geophysical Union
- DOI
- 10.1029/2012JA018213
- ISSN
- 2169-9380
- eISSN
- 2169-9402
- Number of pages
- 7
- Grant note
- 1415150 / NASA; National Aeronautics & Space Administration (NASA) Jet Propulsion Laboratory
- Language
- English
- Date published
- 01/01/2013
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984455268802771
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