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The root of a comet...
The root of a comet tail : Rosetta ion observations at comet 67P/Churyumov–Gerasimenko
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- Behar, Etienne (author)
- Luleå tekniska universitet,Rymdteknik,Swedish Institute of Space Physics, Kiruna
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- Nilsson, Hans (author)
- Luleå tekniska universitet,Rymdteknik,Swedish Institute of Space Physics, Kiruna
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- Henri, P. (author)
- LPC2E, CNRS, Orléans
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- Berecic, L. (author)
- Swedish Institute of Space Physics, Kiruna
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- Nicolaou, G. (author)
- Swedish Institute of Space Physics, Kiruna
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- Stenberg-Wieser, G. (author)
- Swedish Institute of Space Physics, Kiruna
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- Wieser, M. (author)
- Swedish Institute of Space Physics, Kiruna
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- Tabone, B. (author)
- LERMA, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Université, UPMC Univ. Paris
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- Saillenfest, M. (author)
- IMCCE, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Université, UPMC Univ. Paris
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- Goetz, C. (author)
- Technische Universität Braunschweig, Institute for Geophysics and Extraterrestrial Physics
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(creator_code:org_t)
- 2018-08-07
- 2018
- English.
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In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 616
- Related links:
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https://www.aanda.or...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- Context.The first 1000 km of the ion tail of comet 67P/Churyumov–Gerasimenko were explored by the EuropeanRosettaspacecraft,2.7 au away from the Sun.Aims.We characterised the dynamics of both the solar wind and the cometary ions on the night-side of the comet’s atmosphere.Methods.We analysed in situ ion and magnetic field measurements and compared the data to a semi-analytical model.Results.The cometary ions are observed flowing close to radially away from the nucleus during the entire excursion. The solar windis deflected by its interaction with the new-born cometary ions. Two concentric regions appear, an inner region dominated by theexpanding cometary ions and an outer region dominated by the solar wind particles.Conclusions.The single night-side excursion operated byRosettarevealed that the near radial flow of the cometary ions can beexplained by the combined action of three different electric field components, resulting from the ion motion, the electron pressuregradients, and the magnetic field draping. The observed solar wind deflection is governed mostly by the motional electric field−uion×B.
Subject headings
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Rymd- och flygteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Aerospace Engineering (hsv//eng)
Keyword
- Atmosfärsvetenskap
- Atmospheric science
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Behar, Etienne
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Nilsson, Hans
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Henri, P.
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Berecic, L.
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Nicolaou, G.
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Stenberg-Wieser, ...
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show more...
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Wieser, M.
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Tabone, B.
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Saillenfest, M.
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Goetz, C.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Fusion Plasma an ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Mechanical Engin ...
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and Aerospace Engine ...
- Articles in the publication
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Astronomy and As ...
- By the university
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Luleå University of Technology