SOTE: A Nonlinear Method for Magnetic Topology Reconstruction in Space Plasmas

doi:10.3847/1538-4365/ab391a

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院地球与行星物理重点实验室

	SOTE: A Nonlinear Method for Magnetic Topology Reconstruction in Space Plasmas
	Liu,Y. Y.7; Fu,H. S.7; Olshevsky,V.6; Pontin,D. I.5; Liu,C. M.7; Wang,Z.7; Chen,G.3,4; Dai,L.2; Retino,A.1
刊名	The Astrophysical Journal Supplement Series
	2019-10-01
卷号	244 期号:2
关键词	magnetic fields magnetic reconnection methods: data analysis solar wind turbulence
ISSN号	0067-0049
DOI	10.3847/1538-4365/ab391a
英文摘要	Abstract Complex magnetic structures are ubiquitous in turbulent astrophysical plasmas. Such structures can be host to many dynamic processes, such as magnetic reconnection and energy dissipation. Thus, revealing the 3D topologies of these structures is necessary. In this study, we propose a new method to reconstruct complex magnetic topologies in quasi-steady space plasmas, by utilizing eight-point measurements of magnetic fields and particles. Such a method, based on the Second-Order Taylor Expansion (SOTE) of a magnetic field, is nonlinear; it is constrained by and , where is from particle moments. A benchmark test of this method, using the simulation data, shows that the method can give accurate reconstruction results within an area about three times the size of a spacecraft tetrahedron. By comparing to the previous First-Order Taylor Expansion (FOTE) method, this method (SOTE) gives similar results for reconstructing quasilinear structures but exhibits better accuracy in reconstructing nonlinear structures. Such a method will be useful to the multi-scale missions, such as the future European Space Agency's “cross-scale” mission and China's “self-adaptive” mission. Also, it can be applied to four-point missions, such as Cluster and the Magnetospheric Multiscale Mission. We demonstrated how to apply this method to the four-point missions. In principle, this method will be useful to study shocks, magnetic holes, dipolarization fronts, and other nonlinear structures in space plasmas.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0067-0049-244-2-AB391A
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/93871]
专题	地质与地球物理研究所_中国科学院地球与行星物理重点实验室
作者单位	1.Laboratoire de Physique des Plasmas, CNRS/Ecole Polytechnique/Sorbonne, Université/Université Paris Sud/Observatoire de Paris, Paris, France 2.National Space Science Center, Chinese Academy of Sciences, Beijing, People’s Republic of China 3.Institutions of Earth Science, Chinese Academy of Sciences, Beijing, People’s Republic of China 4.Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Beijing, People’s Republic of China 5.University of Dundee, Dundee, UK 6.KTH Royal Institute of Technology, Stockholm, Sweden 7.School of Space and Environment, Beihang University, Beijing, People’s Republic of China; huishanf@gmail.com
推荐引用方式 GB/T 7714	Liu,Y. Y.,Fu,H. S.,Olshevsky,V.,et al. SOTE: A Nonlinear Method for Magnetic Topology Reconstruction in Space Plasmas[J]. The Astrophysical Journal Supplement Series,2019,244(2).
APA	Liu,Y. Y..,Fu,H. S..,Olshevsky,V..,Pontin,D. I..,Liu,C. M..,...&Retino,A..(2019).SOTE: A Nonlinear Method for Magnetic Topology Reconstruction in Space Plasmas.The Astrophysical Journal Supplement Series,244(2).
MLA	Liu,Y. Y.,et al."SOTE: A Nonlinear Method for Magnetic Topology Reconstruction in Space Plasmas".The Astrophysical Journal Supplement Series 244.2(2019).