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| Titel |
Preliminary Inventory of the Coma at 67P/Churyumov-Gerasimenko and its Time Evolution |
| VerfasserIn |
Ursina Calmonte, Kathrin Altwegg  , Léna Le Roy, Martin Rubin, Jean-Jacques Berthelier, Johan De Keyser, Björn Fiethe, Stephen A. Fuselier, Mike Combi |
| 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 |
250104434
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| Publikation (Nr.) |
 EGU/EGU2015-3852.pdf |
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| Zusammenfassung |
| Since the encounter on August 6, 2014 the European Space Agency’s Rosetta mission is accompanying comet 67P/Churyumov-Gerasimenko on the way to its perihelion and beyond. On board of the Rosetta spacecraft is the ROSINA (Rosetta Orbiter Spectrometer for Ion and Neutral Analysis) experiment. ROSINA consists of a pressure sensor and two complementary mass spectrometers. One is the Double Focusing Mass Spectrometer (DFMS), which has high dynamic range and a mass resolution m/Δm = 3000 at 1% peak height (HWHM 9000) at mass 28 u/q. It is therefore well suited to detect minor species in the lower mass/charge range up to mass 140 u/q [1].
Since the encounter ROSINA-DFMS has acquired numerous high-resolution spectra within cometary distances ranging from a few 100 km (Comet Approach Phase) to 10 km in October 2014 (Comet Mapping Phase). A range of latitudes and longitudes of the sub-spacecraft point have been sampled and analysed to derive a complete picture of the coma.
Besides a brief introduction in the functional principle of DFMS we will have a preliminary discussion of the volatile inventory in the coma, its time evolution, and heterogeneity. |
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