Le satellite Encelade source d'ions N dans la magnétosphère de Saturne |
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| Authors: | Mehdi Bouhram Jean-Jacques Berthelier Jean-Marie Illiano Howard T. Smith Edward C. Sittler Frank J. Crary Dave T. Young |
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| Affiliation: | aCentre d'étude des environnements terrestre et planétaires, 4, avenue de Neptune, 94100 Saint-Maur des Fossés, France;bMaterial Science and Engineering, University of Virginia, Charlottesville, VA 22904, USA;cNASA Goddard Spaceflight Center, Greenbelt, MD 20771, USA;dSouthwest Research Institute, San Antonio, TX 78238, USA |
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| Abstract: | The first pass of the Cassini probe in the vicinity of Saturn, above the E-ring, demonstrated a plasma consisting of water group ions (H+, O+, OH+, H2O+) with a small N+ ion component (3%). Using a simple model for the transport of magnetospheric ions, we show that the N+ ions can be traced back to the Enceladus satellite. Such a result can be explained by the existence in this icy satellite, supposed to be still geologically active, of volatile components such as ammonia NH3, or by the previous implantation of N+ ions of external origin on its surface. To cite this article: M. Bouhram et al., C. R. Physique 6 (2005). |
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| Keywords: | Mots-clé s: Plané tologie Plasmas Saturne Anneaux et satellites de glace Magné tosphè rePlanetary science Plasmas Saturn Rings and icy satellites Magnetosphere |
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