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MMS observations of ion-scale magnetic island in the magnetosheath turbulent plasma
Wuhan Univ, Sch Elect Informat, Wuhan, Peoples R China.;UPMC, Ecole Polytech, CNRS, Lab Phys Plasmas, Palaiseau, France..
UPMC, Ecole Polytech, CNRS, Lab Phys Plasmas, Palaiseau, France..
UPMC, Ecole Polytech, CNRS, Lab Phys Plasmas, Palaiseau, France..
UPMC, Ecole Polytech, CNRS, Lab Phys Plasmas, Palaiseau, France..
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2016 (English)In: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007, Vol. 43, no 15, 7850-7858 p.Article 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
2016. Vol. 43, no 15, 7850-7858 p.
Keyword [en]
magnetic island, magnetosheath, electrostatic solitary waves, lower hybrid drift waves, electron beams, multiscale coupling
National Category
Geophysics
Identifiers
URN: urn:nbn:se:uu:diva-305570DOI: 10.1002/2016GL070033ISI: 000383290300008OAI: oai:DiVA.org:uu-305570DiVA: diva2:1038596
Available from: 2016-10-19 Created: 2016-10-19 Last updated: 2016-10-19Bibliographically approved

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Khotyaintsev, Yuri V.
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Swedish Institute of Space Physics, Uppsala Division
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