Journal article
Remote sensing of possible plasma density bubbles in the inner Jovian dayside magnetosphere
Journal of Geophysical Research: Space Physics, Vol.109(A9), A09S14
09/2004
DOI: 10.1029/2003JA010130
Abstract
During the 2001 Cassini encounter with Jupiter, the Radio and Plasma Wave Science (RPWS) instrument detected fine spectral and temporal structure with broadband kilometric radiation. Applying known electron cyclotron harmonic radiation models, this microstructure is interpreted as originating from a plasma density depletion or bubble at the edge of the Io torus. The microstructure became very complicated at the event beginning and end (formation of broadband bursty structures), and this is interpreted as originating from high‐frequency (3–4 s period) density waves or fingers found at the edge of the larger density bubble. Such high‐frequency structure at the edges of plasma bubbles is reminiscent of small‐scale structure associated with terrestrial spread‐F density irregularities. We suggest that the narrow extended fingers, observed on a convex portion of the Io torus surface, result from the interchange instability that is shredding the outer edges of the plasma bubble. A similar set of circumstances occurring on a larger scale may explain the emission of Jovian radio bull's‐eye emission observed previously by Ulysses.
Details
- Title: Subtitle
- Remote sensing of possible plasma density bubbles in the inner Jovian dayside magnetosphere
- Creators
- W. M. Farrell - Goddard Space Flight CenterM. L. Kaiser - Goddard Space Flight CenterW. S. Kurth - University of IowaM. D. Desch - Goddard Space Flight CenterD. A. Gurnett - University of IowaG. B. Hospodarsky - University of IowaR. J. MacDowall - Goddard Space Flight Center
- Resource Type
- Journal article
- Publication Details
- Journal of Geophysical Research: Space Physics, Vol.109(A9), A09S14
- DOI
- 10.1029/2003JA010130
- ISSN
- 0148-0227
- eISSN
- 2156-2202
- Number of pages
- 14
- Language
- English
- Date published
- 09/2004
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984455545402771
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