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| Titel |
Relationship between solar wind corotating interaction regions and the phasing and intensity of Saturn kilometric radiation bursts |
| VerfasserIn |
S. V. Badman, S. W. H. Cowley, L. Lamy, B. Cecconi, P. Zarka |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 26, no. 12 ; Nr. 26, no. 12 (2008-11-19), S.3641-3651 |
| Datensatznummer |
250016298
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| Publikation (Nr.) |
 copernicus.org/angeo-26-3641-2008.pdf |
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| Zusammenfassung |
| Voyager spacecraft measurements of Saturn kilometric radiation (SKR)
identified two features of these radio emissions: that they pulse at a
period close to the planetary rotation period, and that the emitted
intensity is correlated with the solar wind dynamic pressure (Desch and
Kaiser, 1981; Desch, 1982; Desch and Rucker, 1983). In this study the
inter-relation between the intensity and the pulsing of the SKR is analysed
using Cassini spacecraft measurements of the interplanetary medium and SKR
over the interval encompassing Cassini's approach to Saturn, and the first
extended orbit. Cassini Plasma Spectrometer ion data were only available for
a subset of the dates of interest, so the interplanetary conditions were
studied primarily using the near-continuously available magnetic field data,
augmented by the ion moment data when available. Intense SKR bursts were
identified when solar wind compressions arrived at Saturn. The intensity of
subsequent emissions detected by Cassini during the compression intervals
was variable, sometimes remaining intense for several planetary rotations,
sometimes dimming and rarely disappearing. The timings of the initial
intense SKR peaks were sometimes independent of the long-term pulsing
behaviour identified in the SKR data. Overall, however, the pulsing of the
SKR peaks during the disturbed intervals was not significantly altered
relative to that during non-compression intervals. |
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