globalchange  > 科学计划与规划
DOI: 10.1002/2016GL069064
论文题名:
Electron jet of asymmetric reconnection
作者: Khotyaintsev Y.V.; Graham D.B.; Norgren C.; Eriksson E.; Li W.; Johlander A.; Vaivads A.; André M.; Pritchett P.L.; Retinò A.; Phan T.D.; Ergun R.E.; Goodrich K.; Lindqvist P.-A.; Marklund G.T.; Le Contel O.; Plaschke F.; Magnes W.; Strangeway R.J.; Russell C.T.; Vaith H.; Argall M.R.; Kletzing C.A.; Nakamura R.; Torbert R.B.; Paterson W.R.; Gershman D.J.; Dorelli J.C.; Avanov L.A.; Lavraud B.; Saito Y.; Giles B.L.; Pollock C.J.; Turner D.L.; Blake J.D.; Fennell J.F.; Jaynes A.; Mauk B.H.; Burch J.L.
刊名: Geophysical Research Letters
ISSN: 0094-9002
EISSN: 1944-8733
出版年: 2016
卷: 43, 期:11
起始页码: 5571
结束页码: 5580
语种: 英语
英文关键词: Buneman instability ; diffusion region ; electron dynamics ; lower hybrid waves ; magnetic reconnection
Scopus关键词: Electrostatics ; Fighter aircraft ; Magnetosphere ; Stability ; Buneman instability ; Diffusion region ; Electron dynamics ; Lower Hybrid waves ; Magnetic reconnections ; Electrons
英文摘要: We present Magnetospheric Multiscale observations of an electron-scale current sheet and electron outflow jet for asymmetric reconnection with guide field at the subsolar magnetopause. The electron jet observed within the reconnection region has an electron Mach number of 0.35 and is associated with electron agyrotropy. The jet is unstable to an electrostatic instability which generates intense waves with E∥ amplitudes reaching up to 300 mV m−1 and potentials up to 20% of the electron thermal energy. We see evidence of interaction between the waves and the electron beam, leading to quick thermalization of the beam and stabilization of the instability. The wave phase speed is comparable to the ion thermal speed, suggesting that the instability is of Buneman type, and therefore introduces electron-ion drag and leads to braking of the electron flow. Our observations demonstrate that electrostatic turbulence plays an important role in the electron-scale physics of asymmetric reconnection. ©2016. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84973444959&doi=10.1002%2f2016GL069064&partnerID=40&md5=f81c4853af816898a9797f22830974b6
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9965
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: Swedish Institute of Space Physics, Uppsala, Sweden

Recommended Citation:
Khotyaintsev Y.V.,Graham D.B.,Norgren C.,et al. Electron jet of asymmetric reconnection[J]. Geophysical Research Letters,2016-01-01,43(11).
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