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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
AbstractComplex 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 del. B = 0 and del x B = mu(0)J, where J = ne(V-i - V-e) 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
Funding OrganizationNSFC ; NSFC ; NSFC ; NSFC
Funding ProjectNSFC[41404133] ; NSFC[41874188] ; NSFC[41574153] ; NSFC[40621003] ; NSFC[41431071]
Funding OrganizationNSFC ; NSFC ; NSFC ; NSFC
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000502057800005
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorFu, H. S.
Affiliation1.Beihang Univ, Sch Space & Environm, Beijing, Peoples R China
2.KTH Royal Inst Technol, Stockholm, Sweden
3.Univ Dundee, Dundee, Scotland
4.Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
5.Chinese Acad Sci, Inst Earth Sci, Beijing, Peoples R China
6.Chinese Acad Sci, Natl Space Sci Ctr, Beijing, Peoples R China
7.Univ Paris Sud, Sorbonne Univ, Lab Phys Plasmas, CNRS,Ecole Polytech,Observ 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]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2019,244(2):11.
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.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,244(2),11.
MLA Liu, Y. Y.,et al."SOTE: A Nonlinear Method for Magnetic Topology Reconstruction in Space Plasmas".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 244.2(2019):11.
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