Magnetospheric Multiscale Observations of Electron Scale Magnetic Peak

	Magnetospheric Multiscale Observations of Electron Scale Magnetic Peak
	Yao, S. T.; Shi, Q. Q.; Guo, R. L.; Yao, Z. H.; Tian, A. M.; Degeling, A. W.; Sun, W. J.; Liu, J.; Wang, X. G.; Zong, Q. G.
刊名	GEOPHYSICAL RESEARCH LETTERS
	2018
卷号	45 期号:2 页码:527-537
关键词	Electron Size Electron Vortex Magnetic Bottle Magnetic Peak Magnetic Mirror Flux Rope
ISSN号	0094-8276
英文摘要	The sudden enhancements of magnetic strength, named magnetic peaks (MPs), are often observed in the magnetosheath of magnetized planets. They are usually identified as flux ropes (FRs) or magnetic mirror mode structures. Previous studies of MPs are mostly on the magnetohydrodynamics (MHD) scale. In this study, an electron scale MP is reported in the Earth magnetosheath. We present a typical case with a scale of similar to 7 electron gyroradii and a duration of similar to 0.18 s. A strong magnetic disturbance and associated electrical current are detected. Electron vortex is found perpendicular to the magnetic field line and is self-consist with the peak. We use multipoint spacecraft techniques to determine the propagation velocity of the MP structure and find that the magnetic peak does propagate relative to the plasma (ion) flow. This is very different from the magnetic mirror mode that does not propagate relative to the plasma flow. Furthermore, we developed an efficient method that can effectively distinguish "magnetic bottle like" and "FRs like" structures. The MP presented in this study is identified as magnetic bottle like type. The mechanism to generate the electron scale magnetic bottle like structure is still unclear, suggesting that new theory needs to be developed to understand such small-scale phenomena.
语种	英语
资助机构	National Natural Science Foundation of China [41774153, 41574157, 41628402] ; young scholar plan of Shandong University at Weihai [2017WHWLJH08] ; European Union ; NSF [AGS-1352669]
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/6199]
专题	国家空间科学中心_空间科学部
通讯作者	Shi, QQ (reprint author), Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai, Peoples R China.; Guo, RL (reprint author), Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China.
推荐引用方式 GB/T 7714	Yao, S. T.,Shi, Q. Q.,Guo, R. L.,et al. Magnetospheric Multiscale Observations of Electron Scale Magnetic Peak[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(2):527-537.
APA	Yao, S. T..,Shi, Q. Q..,Guo, R. L..,Yao, Z. H..,Tian, A. M..,...&Guo, RL .(2018).Magnetospheric Multiscale Observations of Electron Scale Magnetic Peak.GEOPHYSICAL RESEARCH LETTERS,45(2),527-537.
MLA	Yao, S. T.,et al."Magnetospheric Multiscale Observations of Electron Scale Magnetic Peak".GEOPHYSICAL RESEARCH LETTERS 45.2(2018):527-537.