DOI: 10.1002/2016GL068161
论文题名: Electron butterfly distribution modulation by magnetosonic waves
作者: Maldonado A.A. ; Chen L. ; Claudepierre S.G. ; Bortnik J. ; Thorne R.M. ; Spence H.
刊名: Geophysical Research Letters
ISSN: 0094-9140
EISSN: 1944-8871
出版年: 2016
卷: 43, 期: 7 起始页码: 3051
结束页码: 3059
语种: 英语
英文关键词: butterfly
; electron
; magnetosonic
; magnetosphere
; Van Allen
; wave particle
Scopus关键词: Electrons
; Magnetosphere
; Modulation
; Normal distribution
; Butterfly
; Magnetosonic
; Magnetosonic waves
; Pitch angle distribution
; Probe measurements
; Van Allen
; Wave intensities
; Wave particles
; Atmospherics
英文摘要: The butterfly pitch angle distribution is observed as a dip in an otherwise normal distribution of electrons centered about αeq=90°. During storm times, the formation of the butterfly distribution on the nightside magnetosphere has been attributed to L shell splitting combined with magnetopause shadowing and strong positive radial flux gradients. It has been shown that this distribution can be caused by combined chorus and magnetosonic wave scattering where the two waves work together but at different local times. Presented in our study is an event on 21 August 2013, using Van Allen Probe measurements, where a butterfly distribution formation is modulated by local magnetosonic coherent magnetosonic waves intensity. Transition from normal to butterfly distributions coincides with rising magnetosonic wave intensity while an opposite transition occurs when wave intensity diminishes. We propose that bounce resonance with waves is the underlying process responsible for such rapid modulation, which is confirmed by our test particle simulation. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84981765573&doi=10.1002%2f2016GL068161&partnerID=40&md5=83cee33071996e8691ddbe6eb0257cd9
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10103
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Physics, University of Texas at Dallas, Richardson, TX, United States
Recommended Citation:
Maldonado A.A.,Chen L.,Claudepierre S.G.,et al. Electron butterfly distribution modulation by magnetosonic waves[J]. Geophysical Research Letters,2016-01-01,43(7).