globalchange  > 科学计划与规划
DOI: 10.1002/2016GL068545
论文题名:
Electron dynamics in a subproton-gyroscale magnetic hole
作者: Gershman D.J.; Dorelli J.C.; Viñas A.F.; Avanov L.A.; Gliese U.; Barrie A.C.; Coffey V.; Chandler M.; Dickson C.; MacDonald E.A.; Salo C.; Holland M.; Saito Y.; Sauvaud J.-A.; Lavraud B.; Paterson W.R.; Torbert R.; Chen L.-J.; Goodrich K.; Russell C.T.; Strangeway R.J.; Giles B.L.; Pollock C.J.; Moore T.E.; Burch J.L.
刊名: Geophysical Research Letters
ISSN: 0094-9036
EISSN: 1944-8767
出版年: 2016
卷: 43, 期:9
起始页码: 4112
结束页码: 4118
语种: 英语
英文关键词: electron dynamics ; FPI ; kinetic plasma ; magnetic hole ; MMS
Scopus关键词: Dynamics ; Electrons ; Kinetics ; Magnetism ; Magnetosphere ; NASA ; Plasma diagnostics ; Plasma sheaths ; Electron dynamics ; Kinetic plasmas ; Magnetic field magnitudes ; Magnetic hole ; Magnetospheric multiscale missions ; Orders of magnitude ; Plasma conditions ; Temporal resolution ; Magnetoplasma
英文摘要: Magnetic holes are ubiquitous in space plasmas, occurring in the solar wind, downstream of planetary bow shocks, and inside the magnetosphere. Recently, kinetic-scale magnetic holes have been observed near Earth's central plasma sheet. The Fast Plasma Investigation on NASA's Magnetospheric Multiscale (MMS) mission enables measurement of both ions and electrons with 2 orders of magnitude increased temporal resolution over previous magnetospheric instruments. Here we present data from MMS taken in Earth's nightside plasma sheet and use high-resolution particle and magnetometer data to characterize the structure of a subproton-scale magnetic hole. Electrons with gyroradii above the thermal gyroradius but below the current layer thickness carry a current sufficient to account for a ~10-20% depression in magnetic field magnitude. These observations suggest that the size and magnetic depth of kinetic-scale magnetic holes is strongly dependent on the background plasma conditions. © 2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84966455414&doi=10.1002%2f2016GL068545&partnerID=40&md5=7bb3eab82a3ae964d76d5e71c1d20a9b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9999
Appears in Collections:科学计划与规划
气候变化与战略

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作者单位: Department of Astronomy, University of Maryland, College Park, MD, United States

Recommended Citation:
Gershman D.J.,Dorelli J.C.,Viñas A.F.,et al. Electron dynamics in a subproton-gyroscale magnetic hole[J]. Geophysical Research Letters,2016-01-01,43(9).
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