Observation of similar radio signatures at Saturn and Jupiter: Implications for the magnetospheric dynamics

P. Louarn; W.S. Kurth; D.A. Gurnett; G.B. Hospodarsky; A.M. Persoon; B. Cecconi; A. Lecacheux; P. Zarka; P. Canu; A. Roux; H.O. Rucker; W.M. Farrell; M.L. Kaiser; N. Andre; C. Harvey; M. Blanc

doi:10.1029/2007GL030368

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Observation of similar radio signatures at Saturn and Jupiter: Implications for the magnetospheric dynamics

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Observation of similar radio signatures at Saturn and Jupiter: Implications for the magnetospheric dynamics

P. Louarn, W.S. Kurth, D.A. Gurnett, G.B. Hospodarsky, A.M. Persoon, B. Cecconi, A. Lecacheux, P. Zarka, P. Canu, A. Roux, …

Geophysical research letters, Vol.34(20), pp.L20113-n/a

01/01/2007

DOI: 10.1029/2007GL030368

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Abstract

We report on radio signatures observed at Saturn by the Cassini RPWS experiment which are strikingly similar to the Jovian “energetic events” observed by Galileo. They consist of sudden intensifications of the auroral radio emission (SKR) followed by the detection of a periodic narrowband radiation which most likely originates from Saturn's plasma disk. About ten “events” have been observed in 2006, showing on average temporal scales ∼3 times longer than their Jovian counterparts. We analyze the conditions of generation and the visibility of the narrowband radiation and conclude that the Kronian “events” are most likely associated with plasma evacuation from the disk. These observations provide new insights on the role of internal energy releases in Saturn's magnetosphere, known from other observations to be mainly driven by the solar wind.

Astrophysics

Cosmology and Extra-Galactic Astrophysics

Physics

Sciences of the Universe

Details

Title: Subtitle: Observation of similar radio signatures at Saturn and Jupiter: Implications for the magnetospheric dynamics
Creators: P. Louarn - Université Toulouse III - Paul Sabatier
W.S. Kurth - University of Iowa
D.A. Gurnett - University of Iowa
G.B. Hospodarsky - University of Iowa
A.M. Persoon - University of Iowa
B. Cecconi - Observatoire de Paris
A. Lecacheux - Observatoire de Paris
P. Zarka - Observatoire de Paris
P. Canu - Université de Versailles Saint-Quentin-en-Yvelines
A. Roux - Université de Versailles Saint-Quentin-en-Yvelines
H.O. Rucker - Austrian Academy of Sciences
W.M. Farrell - Goddard Space Flight Center
M.L. Kaiser - Goddard Space Flight Center
N. Andre - European Space Research and Technology Centre
C. Harvey - Université Toulouse III - Paul Sabatier
M. Blanc - Université Toulouse III - Paul Sabatier
Resource Type: Journal article
Publication Details: Geophysical research letters, Vol.34(20), pp.L20113-n/a
Publisher: American Geophysical Union
DOI: 10.1029/2007GL030368
ISSN: 0094-8276
eISSN: 1944-8007
Language: English
Date published: 01/01/2007
Academic Unit: Physics and Astronomy
Record Identifier: 9984455556802771

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