DOI: 10.1002/2015GL064959
论文题名: Statistics and accuracy of magnetic null identification in multispacecraft data
作者: Eriksson E. ; Vaivads A. ; Khotyaintsev Y.V. ; Khotyayintsev V.M. ; André M.
刊名: Geophysical Research Letters
ISSN: 0094-9337
EISSN: 1944-9068
出版年: 2015
卷: 42, 期: 17 起始页码: 6883
结束页码: 6889
语种: 英语
英文关键词: cluster
; magnetic nulls
; magnetic reconnection
; MMS
; plasma
; type identification
Scopus关键词: Electric fields
; Magnetic fields
; Magnetism
; Magnetosphere
; Plasmas
; Topology
; Astrophysical plasma
; cluster
; Local fluctuations
; magnetic nulls
; Magnetic reconnections
; Magnetic topologies
; Magnetopause current sheets
; MMS
; Magnetoplasma
; accuracy assessment
; astrophysics
; cluster analysis
; electromagnetic field
; magnetic field
; magnetosphere
; plasma
; reliability analysis
; three-dimensional modeling
; topology
; turbulence
英文摘要: Complex magnetic topologies are ubiquitous in astrophysical plasmas. Analyzing magnetic nulls, regions of vanishing magnetic field, is one way to characterize 3-D magnetic topologies. Magnetic nulls are believed to be important in 3-D reconnection and turbulence. In the vicinity of a null, plasma particles become unmagnetized and can be accelerated to high energies by electric fields. We present the first statistical study of the occurrence of magnetic nulls and their types in the Earth's nightside magnetosphere. We are able to identify the nulls both in the tail and in the magnetopause current sheets. On average, we find one null for every few current sheet crossings. We show that the type identification of magnetic nulls may be sensitive to local fluctuations in the magnetic field. We develop and demonstrate a method to estimate the reliability of the magnetic null type identification. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84943339990&doi=10.1002%2f2015GL064959&partnerID=40&md5=f5de4d8799ed3941b41999bde9aab6ee
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8952
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: Swedish Institute of Space Physics, Uppsala, Sweden
Recommended Citation:
Eriksson E.,Vaivads A.,Khotyaintsev Y.V.,et al. Statistics and accuracy of magnetic null identification in multispacecraft data[J]. Geophysical Research Letters,2015-01-01,42(17).