IGGCAS OpenIR  > 地球与行星物理院重点实验室
SOTE: A Nonlinear Method for Magnetic Topology Reconstruction in Space Plasmas
Liu,Y. Y.1; Fu,H. S.1; Olshevsky,V.2; Pontin,D. I.3; Liu,C. M.1; Wang,Z.1; Chen,G.4,5; Dai,L.6; Retino,A.7
2019-10-01
Source PublicationThe Astrophysical Journal Supplement Series
ISSN0067-0049
Volume244Issue:2
AbstractAbstract 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.
Keywordmagnetic fields magnetic reconnection methods: data analysis solar wind turbulence
DOI10.3847/1538-4365/ab391a
Language英语
WOS IDIOP:0067-0049-244-2-ab391a
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/93871
Collection地球与行星物理院重点实验室
Affiliation1.School of Space and Environment, Beihang University, Beijing, People’s Republic of China; huishanf@gmail.com
2.KTH Royal Institute of Technology, Stockholm, Sweden
3.University of Dundee, Dundee, UK
4.Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Beijing, People’s Republic of China
5.Institutions of Earth Science, Chinese Academy of Sciences, Beijing, People’s Republic of China
6.National Space Science Center, Chinese Academy of Sciences, Beijing, People’s Republic of China
7.Laboratoire de Physique des Plasmas, CNRS/Ecole Polytechnique/Sorbonne, Université/Université Paris Sud/Observatoire de Paris, Paris, France
Recommended Citation
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).
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