Journal articles
16O/18O ratio in water in the coma of comet 67P/Churyumov-Gerasimenko measured with the Rosetta/ROSINA double-focusing mass spectrometer
Isaac Schroeder I
1
Kathrin Altwegg
1, 2
Hans Balsiger
1
Jean-Jacques Berthelier
3
Johan de Keyser
4
Björn Fiethe
5
Stephen A. Fuselier
6, 7
Sébastien Gasc
1
Tamas I. Gombosi
8
Martin Rubin
1
Thierry Sémon
1
Chia-Yu Tzou
1
Susanne Wampfler
2
Peter Wurz
1, 2
Isaac R. H. G. Schroeder I 1
Author
Kathrin Altwegg 1, 2
Author
Hans Balsiger 1
Author
Jean-Jacques Berthelier 3
Mail :
Author
Johan de Keyser 4
Mail :
Author
Björn Fiethe 5
Author
Stephen A. Fuselier 6, 7
Author
Sébastien Gasc 1
Mail :
Author
Susanne Wampfler 2
Author
Peter Wurz 1, 2
Author
1
Physikalisches Institut [Bern] (Sidlerstr. 5, 3012 Bern - Switzerland)
- Universität Bern [Bern] (Hochschulstrasse 4 - CH-3012 Bern - Switzerland)
2
CSH - Center for Space and Habitability (University of Bern,
Hochschulstrasse 4,
3012 Bern - Switzerland)
- University of Bern (Hochschulstrasse 4, 3012 Bern, Switzerland - Switzerland)
3
IMPEC - LATMOS (France)
- LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales (11 boulevard d'Alembert
Quartier des Garennes
78280 - Guyancourt - France)
- INSU - CNRS - Institut national des sciences de l'Univers : UMR8190 (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- CNRS - Centre National de la Recherche Scientifique : UMR8190 (France)
- UVSQ - Université de Versailles Saint-Quentin-en-Yvelines : UMR8190 (55 avenue de Paris - 78035 Versailles cedex - France)
- SU - Sorbonne Université : UMR8190 (21 rue de l’École de médecine - 75006 Paris - France)
4
BIRA-IASB - Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (Ringlaan-3-Avenue Circulaire B-1180 Brussels - Belgium)
5
IDA - Institute of Computer and Network Engineering [Braunschweig] (Hans-Sommer-Street 66, 38106 Braunschweig - Germany)
- Technische Universität Braunschweig [Braunschweig] (38092 Braunschweig - Germany)
6
SwRI - Southwest Research Institute [San Antonio] (6220 Culebra Rd, San Antonio, TX 78238 - United States)
7
UTSA - The University of Texas at San Antonio (1 UTSA Circle, San Antonio, TX 78249 - United States)
8
AOSS - Department of Atmospheric, Oceanic, and Space Sciences [Ann Arbor] (Ann Arbor, MI 48109 - United States)
- University of Michigan [Ann Arbor] (500 Church Street Ann Arbor, MI 48109-1090 - United States)
- University of Michigan System (Michigan - United States)
Abstract : The European Space Agency spacecraft Rosetta accompanied the Jupiter-family comet 67P/Churyumov-Gerasimenko for over 2 yr along its trajectory through the inner solar system. Between 2014 and 2016, it performed almost continuous in situ measurements of the comet’s gaseous atmosphere in close proximity to its nucleus. In this study, the 16O/18O ratio of H2O in the coma of 67P/Churyumov-Gerasimenko, as measured by the ROSINA DFMS mass spectrometer onboard Rosetta, was determined from the ratio of H216O/H218O and 16OH/18OH. The value of 445 ± 35 represents an ~11% enrichment of 18<:sup>O compared with the terrestrial ratio of 498.7 ± 0.1. This cometary value is consistent with the comet containing primordial water, in accordance with leading self-shielding models. These models predict primordial water to be between 5 and 20% enriched in heavier oxygen isotopes compared to terrestrial water.
Document type :
Journal articles
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https://hal-insu.archives-ouvertes.fr/insu-01877503
Contributor : Catherine Cardon <>
Submitted on : Wednesday, September 19, 2018 - 6:16:24 PM
Last modification on : Friday, January 10, 2020 - 3:42:35 PM
Contributor : Catherine Cardon <>
Submitted on : Wednesday, September 19, 2018 - 6:16:24 PM
Last modification on : Friday, January 10, 2020 - 3:42:35 PM
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- HAL Id : insu-01877503, version 1
- DOI : 10.1051/0004-6361/201833806
Collections
INSU | UPMC | LATMOS | CNRS | UVSQ | UNIV-PARIS-SACLAY | SORBONNE-UNIVERSITE | SU-SCIENCES
Citation
Isaac Schroeder I, Kathrin Altwegg, Hans Balsiger, Jean-Jacques Berthelier, Johan de Keyser, et al.. 16O/18O ratio in water in the coma of comet 67P/Churyumov-Gerasimenko measured with the Rosetta/ROSINA double-focusing mass spectrometer. Astronomy and Astrophysics - A&A, EDP Sciences, 2019, 630, A29 (11 p.). ⟨10.1051/0004-6361/201833806⟩. ⟨insu-01877503⟩
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