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The infant bow shock: a new frontier at a weak activity comet
Umeå University, Faculty of Science and Technology, Department of Physics. Royal Belgian Institute for Space Aeronomy (BIRA-IASB), Avenue Circulaire 3, 1180 Brussels, Belgium.ORCID iD: 0000-0001-5379-1158
Umeå University, Faculty of Science and Technology, Department of Physics.ORCID iD: 0000-0002-5765-2806
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2018 (English)In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 619, article id L2Article in journal, Letter (Refereed) Published
Abstract [en]

The bow shock is the first boundary the solar wind encounters as it approaches planets or comets. The Rosetta spacecraft was able to observe the formation of a bow shock by following comet 67P/Churyumov-Gerasimenko toward the Sun, through perihelion, and back outward again. The spacecraft crossed the newly formed bow shock several times during two periods a few months before and after perihelion; it observed an increase in magnetic field magnitude and oscillation amplitude, electron and proton heating at the shock, and the diminution of the solar wind further downstream. Rosetta observed a cometary bow shock in its infancy, a stage in its development not previously accessible to in situ measurements at comets and planets.

Place, publisher, year, edition, pages
EDP Sciences, 2018. Vol. 619, article id L2
Keywords [en]
comets: general, comets: individual: 67P/Churyumov-Gerasimenko, plasmas, shock waves
National Category
Astronomy, Astrophysics and Cosmology Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:umu:diva-153545DOI: 10.1051/0004-6361/201834225ISI: 000449276800001OAI: oai:DiVA.org:umu-153545DiVA, id: diva2:1265285
Funder
Swedish National Space Board, 201/15Available from: 2018-11-22 Created: 2018-11-22 Last updated: 2018-11-22Bibliographically approved

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Gunell, HerbertLindkvist, Jesper

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