Journal articles
Evidence for distributed gas sources of hydrogen halides in the coma of comet 67P/Churyumov–Gerasimenko
Johan de Keyser
1
Frederik Dhooghe
1
Kathrin Altwegg
2, 3
Hans Balsiger
2
Jean-Jacques Berthelier
4
Christelle Briois
5
Ursina Calmonte
2
Gael Cessateur
1
Michael R. Combi
6
Eddy Equeter
1
Bjorn Fiethe
7
Stephen Fuselier
8, 9
Sebastien Gasc
2
Andrew Gibbons
1, 10
Tamas Gombosi
6
Herbert Gunell
1
Myrtha Hassig
2, 8
Lena Le Roy
3
Romain Maggiolo
1
Urs Mall
11
Bernard Marty
12
Eddy Neefs
1
Henri Reme
13
Martin Rubin
2
Thierry Semon
2
Chia-Yu Tzou
2
Peter Wurz
2, 3
Johan de Keyser 1
Mail :
Author
Frederik Dhooghe 1
Mail :
Author
Kathrin Altwegg 2, 3
Author
Hans Balsiger 2
Author
Jean-Jacques Berthelier 4
Mail :
Author
Christelle Briois 5
Mail :
Author
Ursina Calmonte 2
Author
Gael Cessateur 1
Author
1
BIRA-IASB - Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (Ringlaan-3-Avenue Circulaire B-1180 Brussels - Belgium)
2
Physikalisches Institut [Bern] (Sidlerstr. 5, 3012 Bern - Switzerland)
- Universität Bern [Bern] (Hochschulstrasse 4 - CH-3012 Bern - Switzerland)
3
CSH - Center for Space and Habitability (University of Bern,
Hochschulstrasse 4,
3012 Bern - Switzerland)
- University of Bern (Hochschulstrasse 4, 3012 Bern, Switzerland - Switzerland)
4
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)
5
LPC2E - Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (3A, Avenue de la Recherche Scientifique 45071 Orléans cedex 2 - France)
- OSUC - Observatoire des Sciences de l'Univers en région Centre : UMS3116 (Campus Géosciences, 1A rue de la Férollerie, 45071 Orléans - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- Observatoire de Paris (61 Av de l'Observatoire 75014 PARIS - France)
- PSL - PSL Research University (France)
- UO - Université d'Orléans (Château de la Source - Avenue du Parc Floral - BP 6749 - 45067 Orléans cedex 2 - France)
- CNRS - Centre National de la Recherche Scientifique : UMS3116 (France)
- CNES - Centre National d’Études Spatiales [Paris] : UMR 7328 (Siège social : 2 place Maurice Quentin, 75039 Paris - France)
6
CLaSP - Department of Climate and Space Sciences and Engineering (University of Michigan, 2455 Hayward Street, Ann Arbor,
MI-48109-2143 - United States)
- University of Michigan [Ann Arbor] (500 Church Street Ann Arbor, MI 48109-1090 - United States)
- University of Michigan System (Michigan - United States)
7
IDA - Institute of Computer and Network Engineering [Braunschweig] (Hans-Sommer-Street 66, 38106 Braunschweig - Germany)
- Technische Universität Braunschweig [Braunschweig] (38092 Braunschweig - Germany)
8
SwRI - Southwest Research Institute [San Antonio] (6220 Culebra Rd, San Antonio, TX 78238 - United States)
9
UTSA - The University of Texas at San Antonio (1 UTSA Circle, San Antonio, TX 78249 - United States)
10
Service de Chimie Quantique et Photophysique (Université Libre de Bruxelles, CP 160/09, 50 Avenue F.D. Roosevelt, B-1050 Bruxelles - Belgium)
- ULB - Université libre de Bruxelles (Avenue Franklin Roosevelt 50 - 1050 Bruxelles - Belgium)
11
MPS - Max-Planck-Institut für Sonnensystemforschung (Göttingen, Allemagne - Germany)
- Max-Planck-Gesellschaft (Jägerstrasse, 10-11, D-10117 Berlin - Germany)
12
CRPG - Centre de Recherches Pétrographiques et Géochimiques (CNRS / Université de Lorraine, 15 rue Notre-Dame des Pauvres, 54500 Vandoeuvre-les-Nancy - France)
- INSU - CNRS - Institut national des sciences de l'Univers : UMR7358 (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- UL - Université de Lorraine (34 cours Léopold - CS 25233 - 54052 Nancy cedex - France)
- CNRS - Centre National de la Recherche Scientifique : UMR7358 (France)
13
IRAP - Institut de recherche en astrophysique et planétologie (9 avenue Colonel Roche 31028 Toulouse - France)
- CNRS - Centre National de la Recherche Scientifique : UMR5277 (France)
- OMP - Observatoire Midi-Pyrénées (14 avenue Edouard Belin, 31400 TOULOUSE - France)
- Université Fédérale Toulouse Midi-Pyrénées (41 Allée Jules Guesde, 31000 Toulouse - France)
- UT3 - Université Toulouse III - Paul Sabatier (118 route de Narbonne - 31062 Toulouse - France)
- Université Fédérale Toulouse Midi-Pyrénées (41 Allée Jules Guesde, 31000 Toulouse - France)
- INSU - CNRS - Institut national des sciences de l'Univers : UMR5277 (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
Abstract : Rosetta has detected the presence of the hydrogen halides HF, HCl, and HBr in the coma of comet 67P/Churyumov-Gerasimenko. These species are known to freeze out on icy grains in molecular clouds. Analysis of the abundances of HF and HCl as a function of cometocentric distance suggests that these hydrogen halides are released both from the nucleus surface and off dust particles in the inner coma. We present three lines of evidence. First, the abundances of HF and HCl relative to the overall neutral gas in the coma appear to increase with distance, indicating that a net source must be present; since there is no hint at any possible parent species with sufficient abundances that could explain the observed levels of HF or HCl, dust particles are the likely origin. Second, the amplitude of the daily modulation of the halide-to-water density due to the rotation and geometry of 67P's nucleus and the corresponding surface illumination is observed to progressively diminish with distance and comet dust activity; this can be understood from the range of dust particle speeds well below the neutral gas expansion speed, which tends to smooth the coma density profiles. Third, strong halogen abundance changes detected locally in the coma cannot be easily explained from composition changes at the surface, while they can be understood from differences in local gas production from the dust particles.
Keywords :
comets
67P/Churyumov-Gerasimenko
Document type :
Journal articles
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https://hal-insu.archives-ouvertes.fr/insu-02765310
Contributor : Nathalie Pothier <>
Submitted on : Thursday, June 4, 2020 - 8:33:25 AM
Last modification on : Saturday, June 6, 2020 - 4:10:01 AM
Contributor : Nathalie Pothier <>
Submitted on : Thursday, June 4, 2020 - 8:33:25 AM
Last modification on : Saturday, June 6, 2020 - 4:10:01 AM
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stx2725.pdf
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Identifiers
- HAL Id : insu-02765310, version 1
- DOI : 10.1093/mnras/stx2725
Collections
INSU | OBSPM | CRPG-UL | OTELO-UL | PSL | UNIV-LORRAINE | LPC2E | UVSQ | OSUC | LATMOS | OMP-IRAP | OMP | UNIV-ORLEANS | UNIV-TLSE3 | CNRS | SU-SCIENCES | SORBONNE-UNIVERSITE | UNIV-PARIS-SACLAY
Citation
Johan de Keyser, Frederik Dhooghe, Kathrin Altwegg, Hans Balsiger, Jean-Jacques Berthelier, et al.. Evidence for distributed gas sources of hydrogen halides in the coma of comet 67P/Churyumov–Gerasimenko. Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P - Oxford Open Option A, 2017, 469 (Suppl_2), pp.S695-S711. ⟨10.1093/mnras/stx2725⟩. ⟨insu-02765310⟩
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