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The birth and growth of a solar wind cavity around a comet: Rosetta observations
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.
Aalto University, School of Electrical Engineering, Department of Electronics and Nanoengineering.
Technische Universit ̈ at Braunschweig, Institute for Geophysics and Extraterrestrial Physics.
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2017 (English)In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 469, no Suppl. 2, p. S369-S403Article in journal (Refereed) In press
Abstract [en]

The Rosetta mission provided detailed observations of the growth of a cavity in the solar wind around comet 67P/Churyumov–Gerasimenko. As the comet approached the Sun, the plasma of cometary origin grew enough in density and size to present an obstacle to the solar wind. Our results demonstrate how the initial slight perturbations of the solar wind prefigure the formation of a solar wind cavity, with a particular interest placed on the discontinuity (solar wind cavity boundary) passing over the spacecraft. The slowing down and heating of the solar wind can be followed and understood in terms of single particle motion. We propose a simple geometric illustration that accounts for the observations, and shows how a cometary magnetosphere is seeded from the gradual steepening of an initially slight solar wind perturbation. A perspective is given concerning the difference between the diamagnetic cavity and the solar wind cavity.

Place, publisher, year, edition, pages
Oxford University Press, 2017. Vol. 469, no Suppl. 2, p. S369-S403
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:ltu:diva-68779DOI: 10.1093/mnras/stx1871OAI: oai:DiVA.org:ltu-68779DiVA, id: diva2:1206750
Available from: 2018-05-18 Created: 2018-05-18 Last updated: 2018-08-10
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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