MMS observations of large guide field symmetric reconnection between colliding reconnection jets at the center of a magnetic flux rope at the magnetopause

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Title: MMS observations of large guide field symmetric reconnection between colliding reconnection jets at the center of a magnetic flux rope at the magnetopause
Author(s): Øieroset, M
Phan, TD
Haggerty, C
Shay, MA
Eastwood, JP
Gershman, DJ
Drake, JF
Fujimoto, M
Ergun, RE
Mozer, FS
Oka, M
Torbert, RB
Burch, JL
Wang, S
Chen, LJ
Swisdak, M
Pollock, C
Dorelli, JC
Fuselier, SA
Lavraud, B
Giles, BL
Moore, TE
Saito, Y
Avanov, LA
Paterson, W
Strangeway, RJ
Russell, CT
Khotyaintsev, Y
Lindqvist, PA
Malakit, K
Item Type: Journal Article
Abstract: ©2016. American Geophysical Union. All Rights Reserved.We report evidence for reconnection between colliding reconnection jets in a compressed current sheet at the center of a magnetic flux rope at Earths magnetopause. The reconnection involved nearly symmetric inflow boundary conditions with a strong guide field of two. The thin (2.5 ion-skin depth (di) width) current sheet (at ~12 di 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.
Publication Date: 4-Jun-2016
Date of Acceptance: 9-May-2016
URI: http://hdl.handle.net/10044/1/34301
DOI: https://dx.doi.org/10.1002/2016GL069166
ISSN: 0094-8276
Publisher: Wiley
Start Page: 5536
End Page: 5544
Journal / Book Title: Geophysical Research Letters
Volume: 43
Issue: 11
Sponsor/Funder: Science and Technology Facilities Council (STFC)
Funder's Grant Number: ST/K001051/1
Copyright Statement: © 2016. American Geophysical Union. All Rights Reserved.
Keywords: Meteorology & Atmospheric Sciences
MD Multidisciplinary
Publication Status: Published
Appears in Collections:Space and Atmospheric Physics
Physics
Faculty of Natural Sciences



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