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| Titel |
Depression of the magnetic field in an active small-scale flux rope |
| VerfasserIn |
Binbin Tang, Wenya Li, Chi Wang, Lei Dai, Jim Burch, Robert Ergun, Per-Arne Lindqvist, Craig Pollock, Christopher Russell |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250142175
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| Publikation (Nr.) |
 EGU/EGU2017-5756.pdf |
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| Zusammenfassung |
| We report an active small-scale magnetic flux rope (∼9.8di) at the trailing edge of
Kelvin-Helmholtz (KH) waves on September 27 2016 by the Magnetospheric Multiscale
(MMS) mission, which is probably generated by multiple x-line reconnections. The magnetic
field inside this flux rope is significantly depressed, resulting into a non-force-free structure.
The currents of this flux rope are filamentary but structured, and the current filaments at the
edges induce an opposing field that causes observed |B| depressions in the central flux rope.
In addition, intense lower hybrid drift waves (LHDW) are found the magnetospheric edge of
the flux rope, whose wave potential reaches to ∼20% of the electron temperature, thus these
waves could effectively scatter electrons by the wave electric field corresponding to a local
density dip. We suggest LHDW may be stabilized by the electron resonance broadening. |
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