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MMS observations of ion-scale magnetic island in the magnetosheath turbulent plasma
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2016 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 43, no 15, p. 7850-7858Article in journal (Refereed) Published
Abstract [en]

In this letter, first observations of ion-scale magnetic island from the Magnetospheric Multiscale mission in the magnetosheath turbulent plasma are presented. The magnetic island is characterized by bipolar variation of magnetic fields with magnetic field compression, strong core field, density depletion, and strong currents dominated by the parallel component to the local magnetic field. The estimated size of magnetic island is about 8 d(i), where d(i) is the ion inertial length. Distinct particle behaviors and wave activities inside and at the edges of the magnetic island are observed: parallel electron beam accompanied with electrostatic solitary waves and strong electromagnetic lower hybrid drift waves inside the magnetic island and bidirectional electron beams, whistler waves, weak electromagnetic lower hybrid drift waves, and strong broadband electrostatic noise at the edges of the magnetic island. Our observations demonstrate that highly dynamical, strong wave activities and electron-scale physics occur within ion-scale magnetic islands in the magnetosheath turbulent plasma.

Place, publisher, year, edition, pages
Blackwell Publishing, 2016. Vol. 43, no 15, p. 7850-7858
Keyword [en]
magnetic island, magnetosheath, electrostatic solitary waves, lower hybrid drift waves, electron beams, multiscale coupling
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URN: urn:nbn:se:kth:diva-194014DOI: 10.1002/2016GL070033ISI: 000383290300008Scopus ID: 2-s2.0-84981349624OAI: oai:DiVA.org:kth-194014DiVA, id: diva2:1038690
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QC 20161019

Available from: 2016-10-19 Created: 2016-10-14 Last updated: 2017-11-29Bibliographically approved

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Lindqvist, Per-Arne
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