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Generation mechanism of the whistler-mode waves in the plasma sheet prior to magnetic reconnection
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SYSNO ASEP 0423090 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Generation mechanism of the whistler-mode waves in the plasma sheet prior to magnetic reconnection Author(s) Wei, X. H. (CN)
Cao, J. B. (CN)
Zhou, G. C. (CN)
Fu, H. S. (CN)
Santolík, Ondřej (UFA-U) RID, ORCID
Reme, H. (FR)
Dandouras, I. (FR)
Cornilleau, N. (FR)
Fazakerley, A. (GB)Number of authors 9 Source Title Advances in Space Research. - : Elsevier - ISSN 0273-1177
Roč. 52, č. 1 (2013), s. 205-210Number of pages 6 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords whistler-mode waves ; electron temperature anisotropy ; Reconnection ; the plasma sheet Subject RIV BL - Plasma and Gas Discharge Physics Institutional support UFA-U - RVO:68378289 UT WOS 000320639100019 DOI 10.1016/j.asr.2013.02.016 Annotation The whistler-mode waves and electron temperature anisotropy play a key role prior to and during magnetic reconnection. On August 21, 2002, the Cluster spacecrafts encountered a quasi-collisionless magnetic reconnection event when they crossed the plasma sheet. Prior to the southward turning of magnetospheric magnetic field and high speed ion flow, the whistler-mode waves and positive electron temperature anisotropy are simultaneously observed. Theoretic analysis shows that the electrons with positive temperature anisotropy can excite the whistler-mode waves via cyclotron resonances. Using the data of particles and magnetic field, we estimated the whistler-mode wave growth rate and the ratio of whistler-mode growth rate to wave frequency. They are 0.0016f(ce) (Electron cyclotron frequency) and 0.0086f(ce), respectively. Therefore the whistler-mode waves can grow quickly in the current sheet. The combined observations of energetic electron beams and waves show that after the southward turning of magnetic field, energetic electrons in the reconnection process are accelerated by the whistler-mode waves. (C) 2013 COSPAR. Published by Elsevier Ltd. All rights reserved. Workplace Institute of Atmospheric Physics Contact Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Year of Publishing 2014
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