Journal articles
Comparison of 3D kinetic and hydrodynamic models to ROSINA-COPS measurements of the neutral coma of 67P/Churyumov-Gerasimenko
Andre Bieler
1, 2
Kathrin Altwegg
3, 2
Hans Balsiger
2
Jean-Jacques Berthelier
4
Ursina Calmonte
2
Michael R. Combi
1
Johan de Keyser
5
Björn Fiethe
6
Nicolas Fougere
1
Stephen Fuselier
7
Sébastien Gasc
2
Tamas I. Gombosi
1
Kenneth Hansen
1
Myrtha Hässig
7
Zhenguang Huang
1
Annette Jäckel
2
Xianzhe Jia
1
Léna Le Roy
2
Urs Mall
8
Henri Rème
9
Martin Rubin
2
Valeriy Tenishev
1
Gábor Tóth
1
Chia-Yu Tzou
2
Peter Wurz
3, 2
Andre Bieler 1, 2
Author
Kathrin Altwegg 3, 2
Author
Hans Balsiger 2
Author
Jean-Jacques Berthelier 4
Author
Nicolas Fougere 1
Author
Stephen Fuselier 7
Author
Sébastien Gasc 2
Author
Tamas I. Gombosi 1
Author
Xianzhe Jia 1
Author
Léna Le Roy 2
Author IdHAL : lena-le-roy ORCID : https://orcid.org/0000-0002-5984-6153
Urs Mall 8
Author
Henri Rème 9
Author
Peter Wurz 3, 2
Author
1
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)
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
PLANETO - LATMOS (France)
- LATMOS - Laboratoire Atmosphères, Milieux, Observations Spatiales (11 boulevard d'Alembert
Quartier des Garennes
78280 - Guyancourt - France)
- UVSQ - Université de Versailles Saint-Quentin-en-Yvelines : UMR8190 (55 avenue de Paris - 78035 Versailles cedex - France)
- UPMC - Université Pierre et Marie Curie - Paris 6 : UMR8190 (4 place Jussieu - 75005 Paris - 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)
5
BIRA-IASB - Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (Ringlaan-3-Avenue Circulaire B-1180 Brussels - Belgium)
6
IDA - Institute of Computer and Network Engineering [Braunschweig] (Hans-Sommer-Street 66, 38106 Braunschweig - Germany)
- Technische Universität Braunschweig [Braunschweig] (38092 Braunschweig - Germany)
7
Space Science Division [San Antonio] (United States)
- SwRI - Southwest Research Institute [San Antonio] (6220 Culebra Rd, San Antonio, TX 78238 - United States)
8
MPS - Max Planck Institute for Solar System Research (37077 Göttingen - Germany)
- Max-Planck-Gesellschaft (Jägerstrasse, 10-11, D-10117 Berlin - Germany)
9
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)
- Météo France (Direction interrégionale - Sud-Est, 2 boulevard Château Double, Aix-en-Provence - France)
- CNES - Centre National d'Études Spatiales [Toulouse] (18 avenue Edouard Belin 31401 Toulouse - France)
- Université Fédérale Toulouse Midi-Pyrénées (41 Allée Jules Guesde, 31000 Toulouse - France)
- CNRS - Centre National de la Recherche Scientifique : UAR 831 (France)
- IRD - Institut de Recherche pour le Développement (Siège Le Sextant 44, bd de Dunkerque CS 90009 13572 Marseille cedex 02 - 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 : 67P/Churyumov-Gerasimenko (hereafter 67P) is a Jupiter-family comet and the object of investigation of the European Space Agency mission Rosetta. This report presents the first full 3D simulation results of 67P’s neutral gas coma. In this study we include results from a direct simulation Monte Carlo method, a hydrodynamic code, and a purely geometric calculation which computes the total illuminated surface area on the nucleus. All models include the triangulated 3D shape model of 67P as well as realistic illumination and shadowing conditions. The basic concept is the assumption that these illumination conditions on the nucleus are the main driver for the gas activity of the comet. As a consequence, the total production rate of 67P varies as a function of solar insolation. The best agreement between the model and the data is achieved when gas fluxes on the night side are in the range of 7% to 10% of the maximum flux, accounting for contributions from the most volatile components. To validate the output of our numerical simulations we compare the results of all three models to in situ gas number density measurements from the ROSINA COPS instrument. We are able to reproduce the overall features of these local neutral number density measurements of ROSINA COPS for the time period between early August 2014 and January 1 2015 with all three models. Some details in the measurements are not reproduced and warrant further investigation and refinement of the models. However, the overall assumption that illumination conditions on the nucleus are at least an important driver of the gas activity is validated by the models. According to our simulation results we find the total production rate of 67P to be constant between August and November 2014 with a value of about 1 × 1026 molecules s−1.
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Journal articles
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https://hal-insu.archives-ouvertes.fr/insu-01200510
Contributor : Catherine Cardon <>
Submitted on : Monday, August 31, 2020 - 6:17:47 PM
Last modification on : Wednesday, April 7, 2021 - 8:20:03 PM
Long-term archiving on: : Tuesday, December 1, 2020 - 1:00:39 PM
Contributor : Catherine Cardon <>
Submitted on : Monday, August 31, 2020 - 6:17:47 PM
Last modification on : Wednesday, April 7, 2021 - 8:20:03 PM
Long-term archiving on: : Tuesday, December 1, 2020 - 1:00:39 PM
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Identifiers
- HAL Id : insu-01200510, version 1
- DOI : 10.1051/0004-6361/201526178
Collections
INSU | OMP-IRAP | UVSQ | LATMOS | SU-SCIENCES | OMP | CNRS | UNIV-TLSE3 | UPMC | SORBONNE-UNIVERSITE | METEO | IRD | SU-TI
Citation
Andre Bieler, Kathrin Altwegg, Hans Balsiger, Jean-Jacques Berthelier, Ursina Calmonte, et al.. Comparison of 3D kinetic and hydrodynamic models to ROSINA-COPS measurements of the neutral coma of 67P/Churyumov-Gerasimenko. Astronomy and Astrophysics - A&A, EDP Sciences, 2015, 583, pp.A7. ⟨10.1051/0004-6361/201526178⟩. ⟨insu-01200510⟩
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