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MMS observations of large guide field symmetric reconnection between colliding reconnection jets at the center of a magnetic flux rope at the magnetopause
Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA..
Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA..
Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA..
Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA..
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2016 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 43, no 11, 5536-5544 p.Article in journal (Refereed) Published
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Abstract [en]

We report evidence for reconnection between colliding reconnection jets in a compressed current sheet at the center of a magnetic flux rope at Earth's magnetopause. The reconnection involved nearly symmetric inflow boundary conditions with a strong guide field of two. The thin (2.5 ion-skin depth (d(i)) width) current sheet (at similar to 12 d(i) downstream of the X line) was well resolved by MMS, which revealed large asymmetries in plasma and field structures in the exhaust. Ion perpendicular heating, electron parallel heating, and density compression occurred on one side of the exhaust, while ion parallel heating and density depression were shifted to the other side. The normal electric field and double out-of-plane (bifurcated) currents spanned almost the entire exhaust. These observations are in good agreement with a kinetic simulation for similar boundary conditions, demonstrating in new detail that the structure of large guide field symmetric reconnection is distinctly different from antiparallel reconnection.

Place, publisher, year, edition, pages
2016. Vol. 43, no 11, 5536-5544 p.
Keyword [en]
magnetic reconnection, particle acceleration, magnetopause, flux rope, magnetospheric multiscale
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:uu:diva-301042DOI: 10.1002/2016GL069166ISI: 000379851800001OAI: oai:DiVA.org:uu-301042DiVA: diva2:953563
Available from: 2016-08-18 Created: 2016-08-17 Last updated: 2016-08-18Bibliographically approved

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Khotyaintsev, Yuri
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Swedish Institute of Space Physics, Uppsala Division
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