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Slow magnetosonic waves detected in reconnection diffusion region in the Earth's magnetotail
Cao, J. B.1; Wei, X. H.2; Duan, A. Y.2; Fu, H. S.1; Zhang, T. L.3,4; Reme, H.5,6; Dandouras, I.5,6; 北京8701信箱
Department空间天气学国家重点实验室
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
2013-04-01
Volume118Issue:4Pages:1659-1666
ISSN2169-9402
Language英语
KeywordSlow Magnetosonic Waves Periodic Reconnection Ion diffusIon regIon Tailward Ion Flow Hall Effect Whistler Waves
AbstractWe studied the ULF waves with a period of 30 s in the ion diffusion region of reconnection observed by Cluster satellites on 21 August 2002. The fast convective tailward ion flow accompanied with a large southward magnetic field component, a strong Hall magnetic field, and a Hall electric field demonstrates that the Cluster satellites are located in the ion diffusion region of reconnection. The analyses of wave properties using minimum variance analysis and timing method indicate that this wave is an obliquely propagating slow magnetosonic wave which is characterized by the anti phase relation between the magnitude of the magnetic field and the ion number density and by a propagation angle of around 130° with respect to the ambient magnetic field. This wave is generated by periodic magnetic reconnection. The periodic oscillations in the By and Bx components are driven by the periodic Hall current system, while the oscillation in the Bz component is driven by quasiperiodic convective tailward ion flows. The slow magnetosonic wave significantly influences the frequency of whistler waves and low hybrid waves excited by magnetic reconnection by changing the magnitude of the local magnetic field and subsequently the electron cyclotron frequency.; We studied the ULF waves with a period of 30s in the ion diffusion region of reconnection observed by Cluster satellites on 21 August 2002. The fast convective tailward ion flow accompanied with a large southward magnetic field component, a strong Hall magnetic field, and a Hall electric field demonstrates that the Cluster satellites are located in the ion diffusion region of reconnection. The analyses of wave properties using minimum variance analysis and timing method indicate that this wave is an obliquely propagating slow magnetosonic wave which is characterized by the anti phase relation between the magnitude of the magnetic field and the ion number density and by a propagation angle of around 130 degrees with respect to the ambient magnetic field. This wave is generated by periodic magnetic reconnection. The periodic oscillations in the By and Bx components are driven by the periodic Hall current system, while the oscillation in the Bz component is driven by quasiperiodic convective tailward ion flows. The slow magnetosonic wave significantly influences the frequency of whistler waves and low hybrid waves excited by magnetic reconnection by changing the magnitude of the local magnetic field and subsequently the electron cyclotron frequency.
Indexed BySCI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1532
Collection空间科学部
Corresponding Author北京8701信箱
Affiliation1.Beihang Univ, Sch Astronaut, Space Sci Inst, Beijing 100191, Peoples R China
2.Chinese Acad Sci, CSSAR, State Key Lab Space Weather, Beijing, Peoples R China
3.Univ Sci & Technol China, CAS Key Lab Geospace Environm, Hefei 230026, Peoples R China
4.Austrian Acad Sci, Space Res Inst, A-8010 Graz, Austria
5.CNRS, Inst Rech Astrophys & Planetol, Toulouse, France
6.Univ Toulouse, UPS, IRAP, Toulouse, France
Recommended Citation
GB/T 7714
Cao, J. B.,Wei, X. H.,Duan, A. Y.,et al. Slow magnetosonic waves detected in reconnection diffusion region in the Earth's magnetotail[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2013,118(4):1659-1666.
APA Cao, J. B..,Wei, X. H..,Duan, A. Y..,Fu, H. S..,Zhang, T. L..,...&北京8701信箱.(2013).Slow magnetosonic waves detected in reconnection diffusion region in the Earth's magnetotail.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,118(4),1659-1666.
MLA Cao, J. B.,et al."Slow magnetosonic waves detected in reconnection diffusion region in the Earth's magnetotail".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 118.4(2013):1659-1666.
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