Journal article
Auroral Hiss Emissions During Cassini's Grand Finale: Diverse Electrodynamic Interactions Between Saturn and Its Rings
Geophysical research letters, Vol.45(14), pp.6782-6789
07/28/2018
DOI: 10.1029/2018GL077875
Abstract
The Cassini Grand Finale orbits offered a new view of Saturn and its environment owing to multiple highly inclined orbits with unprecedented proximity to the planet during closest approach. The Radio and Plasma Wave Science instrument detected striking signatures of plasma waves in the southern hemisphere. These all propagate in the whistler mode and are classified as (1) a filled funnel‐shaped emission, commonly known as auroral hiss. Here however, our analysis indicates that they are likely associated with currents connected to the rings. (2) First observations of very low frequency saucers directly linked to the planet on field lines also connected to the rings. The latter observations are unique to low altitude orbits, and their presence at the Earth and Saturn alike shows that they are fundamental plasma waves in planetary ionospheres. Our results give an insight, from a unique perspective, into the dynamic and diverse nature of Saturn's environment.
Details
- Title: Subtitle
- Auroral Hiss Emissions During Cassini's Grand Finale: Diverse Electrodynamic Interactions Between Saturn and Its Rings
- Creators
- Ah Sulaiman - University of IowaWs Kurth - University of IowaGb Hospodarsky - University of IowaTf Averkamp - University of IowaAm Persoon - University of IowaJd Menietti - University of IowaS-Y Ye - University of IowaDa Gurnett - University of IowaD. Pisa - Czech Academy of Sciences, Institute of Atmospheric PhysicsWm Farrell - Goddard Space Flight CenterMk Dougherty - Imperial College London
- Resource Type
- Journal article
- Publication Details
- Geophysical research letters, Vol.45(14), pp.6782-6789
- Publisher
- American Geophysical Union
- DOI
- 10.1029/2018GL077875
- ISSN
- 0094-8276
- eISSN
- 1944-8007
- Grant note
- DOI: 10.13039/100006196, name: Jet Propulsion Laboratory, award: 1415150; DOI: 10.13039/501100001824, name: Grantová Agentura České Republiky, award: 16‐16050Y; DOI: 10.13039/100000104, name: National Aeronautics and Space Administration, award: 1415150
- Language
- English
- Date published
- 07/28/2018
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984455278902771
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