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The root of a comet tail: Rosetta ion observations at comet 67P/Churyumov–Gerasimenko
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology. Swedish Institute of Space Physics, Kiruna.ORCID iD: 0000-0003-0177-510X
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Space Technology. Swedish Institute of Space Physics, Kiruna.
LPC2E, CNRS, Orléans.
Swedish Institute of Space Physics, Kiruna.
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2018 (English)In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 616, article id A21Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
EDP Sciences, 2018. Vol. 616, article id A21
National Category
Fusion, Plasma and Space Physics Aerospace Engineering
Research subject
Atmospheric science
Identifiers
URN: urn:nbn:se:ltu:diva-68780DOI: 10.1051/0004-6361/201832842OAI: oai:DiVA.org:ltu-68780DiVA, id: diva2:1206751
Note

Validerad;2018;Nivå 2;2018-08-17 (andbra)

Available from: 2018-05-18 Created: 2018-05-18 Last updated: 2018-08-17Bibliographically approved
In thesis
1. The dynamics of the solar wind in the atmosphere of comet 67P/Churyumov-Gerasimenko
Open this publication in new window or tab >>The dynamics of the solar wind in the atmosphere of comet 67P/Churyumov-Gerasimenko
2018 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Luleå University of Technology, 2018
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
National Category
Fusion, Plasma and Space Physics Aerospace Engineering
Research subject
Atmospheric science
Identifiers
urn:nbn:se:ltu:diva-68785 (URN)978-91-7790-156-3 (ISBN)978-91-7790-157-0 (ISBN)
Public defence
2018-10-12, Aula, IRF, Kiruna, 08:16 (English)
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Available from: 2018-05-21 Created: 2018-05-18 Last updated: 2018-05-21Bibliographically approved

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