DOI: 10.1002/2014GL059223
论文题名: Cluster observations of fast magnetosonic waves in the heliosphere current sheet
作者: Dai L. ; Wygant J.R. ; Cattell C.A. ; Thaller S. ; Kersten K. ; Breneman A. ; Tang X.
刊名: Geophysical Research Letters
ISSN: 0094-10281
EISSN: 1944-10012
出版年: 2014
卷: 41, 期: 5 起始页码: 1398
结束页码: 1405
语种: 英语
英文关键词: Alfvén waves
; fast-mode waves
; heliospheric current sheet
; magnetic discontinuities
Scopus关键词: Magnetic fields
; Plasma density
; Plasma sheaths
; Cluster observations
; Heliospheric current sheet
; Heliospheric plasma
; magnetic discontinuities
; Magnetic field line
; Magnetic field strengths
; N-waves
; Solar wind plasmas
; Solar wind
; amplitude
; magnetic anomaly
; magnetic field
; magnetosphere
; plasma
; solar activity
; solar wind
; spacecraft
英文摘要: We present Cluster spacecraft observations of large-amplitude (δ|B|/|B|∼1) fast-mode magnetosonic waves in the heliospheric current sheet (HCS). The crossings of the HCS and the associated heliospheric plasma sheet (HPS) are encountered by Cluster in the near-Earth solar wind and by ACE upstream of Earth. Multiple current layers are detected in correspondence with small-scale discontinuities in the regime of open magnetic field lines within the HCS. Fast magnetosonic waves are observed at one current layer, accompanying the phase-steeped edge of a large-amplitude transverse Alfvén wave. The observed fast-mode waves are in the frequency range 0.01 Hz-0.2 Hz, characterized by a strong correlation between variations of plasma density and magnetic field strength. Analysis of ratio δE/δBindicate that the fast-mode wave packet consists of an antisunward propagating component and a larger sunward propagating component in the rest frame of the solar wind. The fast-mode waves are not observed by ACE in the upstream solar wind. The generation of the fast-mode waves may relate to the development of the phase-steeped Alfvén wave and has profound effects on the evolution of the solar wind plasma. Key Points Fast-mode waves at the steeped edge of large-amplitude Alfvén waves Direct measurements of current layers in correspondence with discontinuities Implications on the evolution of large-amplitude Alfvén waves in the solar wind ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84895854626&doi=10.1002%2f2014GL059223&partnerID=40&md5=df773121f8432ffdad4f347d4ae1f0f6
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7545
Appears in Collections: 气候减缓与适应
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作者单位: School of Physics and Astronomy, University of Minnesota, Minneapolis MN, United States
Recommended Citation:
Dai L.,Wygant J.R.,Cattell C.A.,et al. Cluster observations of fast magnetosonic waves in the heliosphere current sheet[J]. Geophysical Research Letters,2014-01-01,41(5).