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    First in situ detection of the cometary ammonium ion NH4+ (protonated ammonia NH3) in the coma of 67P/C-G near perihelion

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    Authors
    Beth, A.
    Altwegg, K.
    Balsiger, H.
    Berthelier, J.-J.
    Calmonte, U.
    Combi, M.R.
    De Keyser, J.
    Dhooghe, F.
    Fiethe, B.
    Fuselier, S.A.
    Galand, M.
    Gasc, S.
    Gombosi, T.I.
    Hansen, K.C.
    Hässig, M.
    Héritier, K.L.
    Kopp, E.
    Le Roy, L.
    Mandt, K.E.
    Peroy, S.
    Rubin, M.
    Sémon, T.
    Tzou, C.-Y.
    Vigren, E.
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    Discipline
    Physical sciences
    Audience
    Scientific
    Date
    2016
    Metadata
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    Description
    In this paper,we report the first in situ detection of the ammonium ionNH4 + at 67P/Churyumov- Gerasimenko (67P/C-G) in a cometary coma, using the Rosetta Orbiter Spectrometer for Ion and NeutralAnalysis (ROSINA)/Double Focusing Mass Spectrometer (DFMS). Unlike neutral and ion spectrometers onboard previous cometarymissions, the ROSINA/DFMS spectrometer, when operated in ion mode, offers the capability to distinguish NH4 + from H2O+ in a cometary coma.We present here the ion data analysis of mass-to-charge ratios 18 and 19 at high spectral resolution and compare the results with an ionospheric model to put these results into context. The model confirms that the ammonium ion NH4 + is one of the most abundant ion species, as predicted, in the coma near perihelion.
    Citation
    Beth, A.; Altwegg, K.; Balsiger, H.; Berthelier, J.-J.; Calmonte, U.; Combi, M.R.; De Keyser, J.; Dhooghe, F.; Fiethe, B.; Fuselier, S.A.; Galand, M.; Gasc, S.; Gombosi, T.I.; Hansen, K.C.; Hässig, M.; Héritier, K.L.; Kopp, E.; Le Roy, L.; Mandt, K.E.; Peroy, S.; Rubin, M.; Sémon, T.; Tzou, C.-Y.; Vigren, E. (2016). First in situ detection of the cometary ammonium ion NH4+ (protonated ammonia NH3) in the coma of 67P/C-G near perihelion. , Monthly Notices of the Royal Astronomical Society, Vol. 462, S562-S572, DOI: 10.1093/mnras/stw3370.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/5044
    doi: http://dx.doi.org/10.1093/mnras/stw3370
    scopus: 2-s2.0-85015969687
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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