![Hier klicken, um den Treffer aus der Auswahl zu entfernen](images/unchecked.gif) |
Titel |
A comet's tale: Role of charge exchange in the plasma environment of comet 67P/Churyumov-Gerasimenko |
VerfasserIn |
Cyril Simon Wedlund, Esa Kallio, Markku Alho, Sergey Dyadechkin, Hans Nilsson, Gabriella Stenberg Wieser, Etienne Behar, Herbert Gunell, Mats Holmström |
Konferenz |
EGU General Assembly 2015
|
Medientyp |
Artikel
|
Sprache |
Englisch
|
Digitales Dokument |
PDF |
Erschienen |
In: GRA - Volume 17 (2015) |
Datensatznummer |
250110674
|
Publikation (Nr.) |
EGU/EGU2015-10701.pdf |
|
|
|
Zusammenfassung |
On 6 Aug. 2014, the Rosetta mission arrived in the vicinity of comet 67P/Churyumov-Gerasimenko
(C-G) and started measuring its complex plasma environment, using notably the RPC-ICA
ion spectrometer (Rosetta Plasma Consortium Ion Composition Analyser). A simple model of
charge-exchange processes is first presented for He2+ and H+ solar wind ions that efficiently
convert them into He+ ions (measured by RPC-ICA) and H energetic neutral atoms,
respectively. In a second step, we present a new cometary hybrid plasma model, taking into
account photoionisation, charge-exchange, electron impact ionisation and electron
recombination, dedicated to the interpretation of RPC-ICA measurements. We use this global
model to investigate in more detail the role of the water production rate and charge-exchange
processes in the formation of plasma regions at comet 67P/C-G and for various heliocentric
distances. |
|
|
|
|
|