气候变化领域集成服务门户(CCPortal): First Topology of Electron-Scale Magnetic Hole

CCPortal

DOI	10.1029/2020GL088374
	First Topology of Electron-Scale Magnetic Hole
	Liu Y.Y.; Fu H.S.; Zong Q.G.; Wang Z.; Liu C.M.; Huang S.Y.; Chen Z.Z.; Xu Y.; Shi Q.Q.; Yao S.T.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:18
英文摘要	Electron-scale magnetic holes (ESMHs) have been widely observed in astrophysical and space plasmas, while their generations, evolutions, and three-dimensional topologies are still unclear. Here we report two ESMH events detected by the Magnetospheric Multiscale spacecraft in the solar wind and the magnetosheath, respectively. The divergence analysis for the magnetic field indicates that ESMHs have nonlinear field topologies. Then a recently developed reconstruction method, based on the second-order Taylor expansion, is applied to such ESMHs. Eventually, the first three-dimensional topologies of ESMHs are obtained. The reconstructed results show that the ESMHs may have complex cross-section shapes (e.g., saddle-like shapes) and comparable extension lengths in the parallel and perpendicular directions to the magnetic field, which are inconsistent with the cylinder simplifications for a magnetic hole in previous studies. This work could improve our understandings for the geometric properties and thereby the generations and evolutions of ESMHs. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Magnetic fields; Magnetosphere; Topology; Complex cross-sections; Extension length; Geometric properties; Magnetosheaths; Magnetospheric multi scale; Reconstruction method; Second-order Taylor expansion; Three dimensional topologies; Magnetoplasma; astrophysics; electron; magnetic method; magnetosphere; scale effect; spacecraft; topology
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169747
作者单位	School of Space and Environment, Beihang University, Beijing, China; Key Laboratory of Space Environment Monitoring and Information Processing, Ministry of Industry and Information Technology, Beijing, China; Institute of Space Physics and Applied Technology, Peking University, Beijing, China; School of Electronic Information, Wuhan University, Wuhan, China; Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China
推荐引用方式 GB/T 7714	Liu Y.Y.,Fu H.S.,Zong Q.G.,et al. First Topology of Electron-Scale Magnetic Hole[J],2020,47(18).
APA	Liu Y.Y..,Fu H.S..,Zong Q.G..,Wang Z..,Liu C.M..,...&Yao S.T..(2020).First Topology of Electron-Scale Magnetic Hole.Geophysical Research Letters,47(18).
MLA	Liu Y.Y.,et al."First Topology of Electron-Scale Magnetic Hole".Geophysical Research Letters 47.18(2020).