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Kinetic evidence of magnetic reconnection due to Kelvin-Helmholtz waves
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Swedish Institute of Space Physics, Uppsala Division.
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2016 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 43, no 11, 5635-5643 p.Article in journal (Refereed) Published
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Abstract [en]

The Kelvin-Helmholtz (KH) instability at the Earth's magnetopause is predominantly excited during northward interplanetary magnetic field (IMF). Magnetic reconnection due to KH waves has been suggested as one of the mechanisms to transfer solar wind plasma into the magnetosphere. We investigate KH waves observed at the magnetopause by the Magnetospheric Multiscale (MMS) mission; in particular, we study the trailing edges of KH waves with Alfvenic ion jets. We observe gradual mixing of magnetospheric and magnetosheath ions at the boundary layer. The magnetospheric electrons with energy up to 80keV are observed on the magnetosheath side of the jets, which indicates that they escape into the magnetosheath through reconnected magnetic field lines. At the same time, the low-energy (below 100eV) magnetosheath electrons enter the magnetosphere and are heated in the field-aligned direction at the high-density edge of the jets. Our observations provide unambiguous kinetic evidence for ongoing reconnection due to KH waves.

Place, publisher, year, edition, pages
2016. Vol. 43, no 11, 5635-5643 p.
Keyword [en]
kinetic evidence, reconnection, Kelvin-Helmholtz wave
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:uu:diva-301046DOI: 10.1002/2016GL069192ISI: 000379851800012OAI: oai:DiVA.org:uu-301046DiVA: diva2:953568
Funder
Swedish National Space Board, 164/14, 176/15
Available from: 2016-08-18 Created: 2016-08-17 Last updated: 2017-02-21Bibliographically approved

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Li, WenyaAndre, MatsKhotyaintsev, Yuri V.Vaivads, AndrisGraham, Daniel B.Norgren, Cecilia
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Swedish Institute of Space Physics, Uppsala DivisionSpace Plasma Physics
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Geophysical Research Letters
Astronomy, Astrophysics and Cosmology

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