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| Titel |
Ion time scale dispersion relations and fluctuations at comets |
| VerfasserIn |
Herbert Gunell, Hans Nilsson, Anders Eriksson, Cyril Simon Wedlund, Gabriella Stenberg Wieser, Esa Kallio, Masatoshi Yamauchi, Etienne Behar, Romain Maggiolo, Frederik Dhooghe, Johan De Keyser |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250110158
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| Publikation (Nr.) |
 EGU/EGU2015-10132.pdf |
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| Zusammenfassung |
| The Rosetta spacecraft has been accompanying comet
67P/Churyumov-Gerasimenko since 2014. As the comet approached the sun,
the outgassing rate increased, and the thus created neutral atmosphere
started to interact with the solar wind. The Rosetta Plasma Consortium
(RPC) ion instruments have observed these interaction processes at this
low activity comet. These observations include deflection of solar wind
protons and alpha particles; singly charged helium ions being produced
in charge exchange collisions between solar wind alpha particles and
cometary neutrals; and water ions of cometary origin that have been
accelerated by the solar wind electric field. These populations combine
to form an ion distribution function. We use the RPC Ion Composition
Analyser (RPC-ICA) to measure that distribution function, which we
then analyse for fluctuations and dispersion relations on the ion
time scale. |
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