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DOI: 10.1002/2016GL068758
Magnetospheric Multiscale Mission observations and non-force free modeling of a flux transfer event immersed in a super-Alfvénic flow
Author: Farrugia C.J.; Lavraud B.; Torbert R.B.; Argall M.; Kacem I.; Yu W.; Alm L.; Burch J.; Russell C.T.; Shuster J.; Dorelli J.; Eastwood J.P.; Ergun R.E.; Fuselier S.; Gershman D.; Giles B.L.; Khotyaintsev Y.V.; Lindqvist P.A.; Matsui H.; Marklund G.T.; Phan T.D.; Paulson K.; Pollock C.; Strangeway R.J.
Source Publication: Geophysical Research Letters
ISSN: 0094-9654
EISSN: 1944-9385
Publishing Year: 2016
Volume: 43, Issue:12
pages begin: 6070
pages end: 6077
Language: 英语
Keyword: detailed plasma behavior in and around FTE ; draping signatures around an FTE ; nonforce-free modeling of the FTE flux rope
Scopus Keyword: Electric fields ; Geomagnetism ; Magnetic fields ; Magnetism ; Magnetosphere ; Parallel flow ; Rope ; Draping signatures around an FTE ; Flux ropes ; Flux transfer events ; Geomagnetic equator ; High resolution data ; Magnetospheric multiscale missions ; Northern Hemispheres ; Plasma behavior ; Magnetoplasma
English Abstract: We analyze plasma, magnetic field, and electric field data for a flux transfer event (FTE) to highlight improvements in our understanding of these transient reconnection signatures resulting from high-resolution data. The ∼20 s long, reverse FTE, which occurred south of the geomagnetic equator near dusk, was immersed in super-Alfvénic flow. The field line twist is illustrated by the behavior of flows parallel/perpendicular to the magnetic field. Four-spacecraft timing and energetic particle pitch angle anisotropies indicate a flux rope (FR) connected to the Northern Hemisphere and moving southeast. The flow forces evidently overcame the magnetic tension. The high-speed flows inside the FR were different from those outside. The external flows were perpendicular to the field as expected for draping of the external field around the FR. Modeling the FR analytically, we adopt a non-force free approach since the current perpendicular to the field is nonzero. It reproduces many features of the observations. ©2016. American Geophysical Union. All Rights Reserved.
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Document Type: 期刊论文
Appears in Collections:科学计划与规划

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Affiliation: Space Science Center, University of New Hampshire, Durham, NH, United States

Recommended Citation:
Farrugia C.J.,Lavraud B.,Torbert R.B.,et al. Magnetospheric Multiscale Mission observations and non-force free modeling of a flux transfer event immersed in a super-Alfvénic flow[J]. Geophysical Research Letters,2016-01-01,43(12).
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