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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

Beth, A. (author)
Imperial Coll London, Dept Phys, Prince Consort Rd, London SW7 2AZ, England.
Altwegg, K. (author)
Univ Bern, Phys Inst, CH-3012 Bern, Switzerland.
Balsiger, H. (author)
Univ Bern, Phys Inst, CH-3012 Bern, Switzerland.
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Berthelier, J. -J (author)
Calmonte, U. (author)
Univ Bern, Phys Inst, CH-3012 Bern, Switzerland.
Combi, M. R. (author)
Univ Michigan, Dept Atmospher Ocean & Space Sci, 2455 Hayward, Ann Arbor, MI 48109 USA.
De Keyser, J. (author)
Royal Belgian Inst Space Aeron, BIRA, IASB, Ringlaan 3, B-1180 Brussels, Belgium.
Dhooghe, F. (author)
Royal Belgian Inst Space Aeron, BIRA, IASB, Ringlaan 3, B-1180 Brussels, Belgium.
Fiethe, B. (author)
TU Braunschweig, Inst Comp & Network Engn IDA, Hans Sommer Str 66, D-38106 Braunschweig, Germany.
Fuselier, S. A. (author)
Univ Texas San Antonio, Dept Phys & Astron, San Antonio, TX 78228 USA.;Southwest Res Inst San Antonio, San Antonio, TX 78228 USA.
Galand, M. (author)
Imperial Coll London, Dept Phys, Prince Consort Rd, London SW7 2AZ, England.
Gasc, S. (author)
Univ Bern, Phys Inst, CH-3012 Bern, Switzerland.
Gombosi, T. I. (author)
Univ Michigan, Dept Atmospher Ocean & Space Sci, 2455 Hayward, Ann Arbor, MI 48109 USA.
Hansen, K. C. (author)
Univ Michigan, Dept Atmospher Ocean & Space Sci, 2455 Hayward, Ann Arbor, MI 48109 USA.
Hassig, M. (author)
Univ Bern, Phys Inst, CH-3012 Bern, Switzerland.;Univ Texas San Antonio, Dept Phys & Astron, San Antonio, TX 78228 USA.
Heritier, K. L. (author)
Imperial Coll London, Dept Phys, Prince Consort Rd, London SW7 2AZ, England.
Kopp, E. (author)
Univ Bern, Phys Inst, CH-3012 Bern, Switzerland.
Le Roy, L. (author)
Univ Bern, Phys Inst, CH-3012 Bern, Switzerland.
Mandt, K. E. (author)
Univ Texas San Antonio, Dept Phys & Astron, San Antonio, TX 78228 USA.;Southwest Res Inst San Antonio, San Antonio, TX 78228 USA.
Peroy, S. (author)
Imperial Coll London, Dept Phys, Prince Consort Rd, London SW7 2AZ, England.
Rubin, M. (author)
Univ Bern, Phys Inst, CH-3012 Bern, Switzerland.
Semon, T. (author)
Univ Bern, Phys Inst, CH-3012 Bern, Switzerland.
Tzou, C. -Y (author)
Vigren, Erik (author)
Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
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Imperial Coll London, Dept Phys, Prince Consort Rd, London SW7 2AZ, England Univ Bern, Phys Inst, CH-3012 Bern, Switzerland. (creator_code:org_t)
2017-01-03
2016
English.
In: Monthly notices of the Royal Astronomical Society. - : OXFORD UNIV PRESS. - 0035-8711 .- 1365-2966. ; 462, s. S562-S572
Related links:
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https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • In this paper, we report the first in situ detection of the ammonium ion NH4+ at 67P/Churyumov-Gerasimenko (67P/C-G) in a cometary coma, using the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA)/Double Focusing Mass Spectrometer (DFMS). Unlike neutral and ion spectrometers onboard previous cometary missions, 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.

Subject headings

NATURVETENSKAP  -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)

Keyword

astrochemistry
plasmas
methods: data analysis
Sun: UV radiation
comets: individual: 67P

Publication and Content Type

ref (subject category)
art (subject category)

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