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Ion composition at ...
Ion composition at comet 67P near perihelion : Rosetta observations and model-based interpretation
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- Heritier, K. L. (author)
- Imperial Coll London, Dept Phys, Prince Consort Rd, London SW7 2AZ, England
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- Altwegg, K. (author)
- Univ Bern, Phys Inst, Sidlerstr 5, CH-3012 Bern, Switzerland
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- Balsiger, H. (author)
- Univ Bern, Phys Inst, Sidlerstr 5, CH-3012 Bern, Switzerland
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Berthelier, J. -J (author)
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- Beth, A. (author)
- Imperial Coll London, Dept Phys, Prince Consort Rd, London SW7 2AZ, England
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- Bieler, A. (author)
- Univ Bern, Phys Inst, Sidlerstr 5, CH-3012 Bern, Switzerland
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- Biver, N. (author)
- Univ Paris Diderot, UPMC Univ Paris 06, Sorbonne Univ, CNRS,PSL Res Univ,Observat Paris,LESIA, Sorbonne Paris Cite,5 Pl Jules Janssen, F-92195 Meudon, France
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- Calmonte, U. (author)
- Univ Bern, Phys Inst, Sidlerstr 5, CH-3012 Bern, Switzerland
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- Combi, M. R. (author)
- Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA,Univ Bern, Phys Inst, Sidlerstr 5, CH-3012 Bern, Switzerland
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- De Keyser, J. (author)
- Royal Belgian Inst Space Aeron, BIRA IASB, Ringlaan 3, B-1180 Brussels, Belgium
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- Eriksson, Anders I. (author)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen,Uppsala universitet, Institutet för rymdfysik, Uppsalaavdelningen
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- Fiethe, B. (author)
- TU Braunschweig, Inst Comp & Network Engn IDA, D-38106 Braunschweig, Germany
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- Fougere, N. (author)
- Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA
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- Fuselier, S. A. (author)
- Southwest Res Inst, PO Drawer 28510, San Antonio, TX 78228 USA;Univ Texas San Antonio, San Antonio, TX 78249 USA
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- Galand, M. (author)
- Imperial Coll London, Dept Phys, Prince Consort Rd, London SW7 2AZ, England
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- Gasc, S. (author)
- Univ Bern, Phys Inst, Sidlerstr 5, CH-3012 Bern, Switzerland
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- Gombosi, T. I. (author)
- Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA
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- Hansen, K. C. (author)
- Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA
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- Hassig, M. (author)
- Univ Bern, Phys Inst, Sidlerstr 5, CH-3012 Bern, Switzerland;Southwest Res Inst, PO Drawer 28510, San Antonio, TX 78228 USA
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- Kopp, E. (author)
- Univ Bern, Phys Inst, Sidlerstr 5, CH-3012 Bern, Switzerland
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- Odelstad, Elias (author)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen,Swedish Inst Space Phys, Box 537, SE-75121 Uppsala, Sweden.
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- Rubin, M. (author)
- Univ Bern, Phys Inst, Sidlerstr 5, CH-3012 Bern, Switzerland
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Tzou, C. -Y (author)
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- Vigren, Erik (author)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen,Uppsala universitet, Institutet för rymdfysik, Uppsalaavdelningen
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- Vuitton, V. (author)
- Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France
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(creator_code:org_t)
- 2017-07-27
- 2017
- English.
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In: Monthly notices of the Royal Astronomical Society. - : OXFORD UNIV PRESS. - 0035-8711 .- 1365-2966. ; 469, s. S427-S442
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Abstract
Subject headings
Close
- We present the ion composition in the coma of comet 67P with newly detected ion species over the 28-37 u mass range, probed by Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA)/Double Focusing Mass Spectrometer (DFMS). In summer 2015, the nucleus reached its highest outgassing rate and ion-neutral reactions started to take place at low cometocentric distances. Minor neutrals can efficiently capture protons from the ion population, making the protonated version of these neutrals a major ion species. So far, only NH4+ has been reported at comet 67P. However, there are additional neutral species with proton affinities higher than that of water (besides NH3) that have been detected in the coma of comet 67P: CH3OH, HCN, H2CO and H2S. Their protonated versions have all been detected. Statistics showing the number of detections with respect to the number of scans are presented. The effect of the negative spacecraft potential probed by the Rosetta Plasma Consortium/LAngmuir Probe on ion detection is assessed. An ionospheric model has been developed to assess the different ion density profiles and compare them to the ROSINA/DFMS measurements. It is also used to interpret the ROSINA/DFMS observations when different ion species have similar masses, and their respective densities are not high enough to disentangle them using the ROSINA/DFMS high-resolution mode. The different ion species that have been reported in the coma of 67P are summarized and compared with the ions detected at comet 1P/Halley during the Giotto mission.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Keyword
- plasmas
- methods: data analysis
- Sun: UV radiation
- comets: individual: 67P
Publication and Content Type
- ref (subject category)
- art (subject category)
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To the university's database
- By the author/editor
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Heritier, K. L.
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Altwegg, K.
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Balsiger, H.
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Berthelier, J. - ...
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Beth, A.
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Bieler, A.
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show more...
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Biver, N.
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Calmonte, U.
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Combi, M. R.
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De Keyser, J.
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Eriksson, Anders ...
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Fiethe, B.
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Fougere, N.
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Fuselier, S. A.
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Galand, M.
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Gasc, S.
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Gombosi, T. I.
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Hansen, K. C.
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Hassig, M.
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Kopp, E.
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Odelstad, Elias
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Rubin, M.
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Tzou, C. -Y
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Vigren, Erik
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Vuitton, V.
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show less...
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NATURAL SCIENCES
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Royal Institute of Technology
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Uppsala University