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Title: Ion-scale secondary flux ropes generated by magnetopause reconnection as resolved by MMS
Authors: J. P. Eastwood
T. D. Phan
P. A. Cassak
D. J. Gershman
C. Haggerty
K. Malakit
M. A. Shay
R. Mistry
M. Øieroset
C. T. Russell
J. A. Slavin
M. R. Argall
L. A. Avanov
J. L. Burch
L. J. Chen
J. C. Dorelli
R. E. Ergun
B. L. Giles
Y. Khotyaintsev
B. Lavraud
P. A. Lindqvist
T. E. Moore
R. Nakamura
W. Paterson
C. Pollock
R. J. Strangeway
R. B. Torbert
S. Wang
Imperial College London
Space Sciences Laboratory at UC Berkeley
West Virginia University
NASA Goddard Space Flight Center
University of Maryland
University of Delaware
Mahidol University
University of California, Los Angeles
University of Michigan, Ann Arbor
University of New Hampshire Durham
Southwest Research Institute
University of Colorado at Boulder
Instiutet för rymdfysik
Universite de Toulouse
CNRS Centre National de la Recherche Scientifique
The Royal Institute of Technology (KTH)
Institut fur Weltraumforschung
Denali Scientific
Keywords: Earth and Planetary Sciences
Issue Date: 1-Jan-2016
Citation: Geophysical Research Letters. Vol.43, No.10 (2016), 4716-4724
Abstract: ©2016. The Authors. New Magnetospheric Multiscale (MMS) observations of small-scale (~7 ion inertial length radius) flux transfer events (FTEs) at the dayside magnetopause are reported. The 10 km MMS tetrahedron size enables their structure and properties to be calculated using a variety of multispacecraft techniques, allowing them to be identified as flux ropes, whose flux content is small (~22 kWb). The current density, calculated using plasma and magnetic field measurements independently, is found to be filamentary. Intercomparison of the plasma moments with electric and magnetic field measurements reveals structured non-frozen-in ion behavior. The data are further compared with a particle-in-cell simulation. It is concluded that these small-scale flux ropes, which are not seen to be growing, represent a distinct class of FTE which is generated on the magnetopause by secondary reconnection.
ISSN: 19448007
Appears in Collections:Scopus 2016-2017

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