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| Titel |
Properties of the Diamagnetic Cavity at Comet 67P/Churyumov-Gerasimenko |
| VerfasserIn |
Charlotte Goetz, Christoph Koenders, Ingo Richter, Kathrin Altwegg  , Christopher Carr, Emanuele Cupido, Anders Eriksson, Pierre Henri, Hans Nilsson, Martin Rubin, Bruce Tsurutani, Martin Volwerk, Karl-Heinz Glassmeier |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250128638
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| Publikation (Nr.) |
 EGU/EGU2016-8643.pdf |
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| Zusammenfassung |
| After the detection of a diamagnetic cavity at comet 1P/Halley, it was predicted that the cavity at the weaker comet 67P/Churyumov-Gerasimenko would only extend a few tens of kilometers. However in the summer of 2015, the signatures of a cavity were detected at distances of up to 480 km. Up until January 2016 a total of ~700 intervals when Rosetta was situated in the diamagnetic cavity have been detected. This opens up the possibility of a statistical analysis of the diamagnetic cavity properties. With the help of a Minimum Variance Analysis the boundary normal may be estimated and used to determine a general structure of the diamagnetic cavity, revealing that the cavity is by no means describable by a simple paraboloid model. The large number of data points is also used to estimate a boundary velocity and verify the existence of Kelvin-Helmholtz instabilities at the cavity boundary. |
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