气候变化领域集成服务门户(CCPortal): Lower Hybrid Waves at the Magnetosheath Separatrix Region

CCPortal

DOI	10.1029/2020GL089880
	Lower Hybrid Waves at the Magnetosheath Separatrix Region
	Tang B.-B.; Li W.Y.; Graham D.B.; Wang C.; Khotyaintsev Y.V.; Le A.; Giles B.L.; Lindqvist P.-A.; Ergun R.E.; Burch J.L.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:20
英文摘要	Lower hybrid waves are investigated at the magnetosheath separatrix region in asymmetric guide field reconnection by using the Magnetospheric Multiscale (MMS) mission. Three of the four MMS spacecraft observe clear wave activities around the lower hybrid frequency across the magnetosheath separatrix, where a density gradient is present. The observed waves are consistent with generation by the lower hybrid drift instability. The characteristic properties of these waves include the following: (1) the waves propagate toward the x-line in the spacecraft frame due to the large out-of-plane magnetic field, which is in the same direction of the diamagnetic drift of the x-line; (2) the wave potential is about 20% of the electron temperature. These drift waves effectively produce cross-field particle diffusion, enabling the transport of magnetosheath electrons into the exhaust region. At last, we suggest that the lower hybrid waves at the magnetosheath separatrix region represent some unique features of asymmetric guide field reconnection, which is different from that widely observed at the magnetospheric side of magnetopause reconnection. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Earth sciences; Geophysics; Characteristic properties; Density gradients; Lower Hybrid waves; Lower-hybrid drift instabilities; Magnetospheric multiscale missions; Out-of-plane magnetic fields; Particle diffusion; Spacecraft frames; Magnetosphere; asymmetry; diffusion; electromagnetic wave; electron; magnetic field; magnetopause; spacecraft; temperature
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/169573
作者单位	State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing, China; Swedish Institute of Space Physics, Uppsala, Sweden; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China; Plasma Theory and Applications, Los Alamos National Laboratory, Los Alamos, NM, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Space and Plasma Physics, School of Electrical Engineering, KTH Royal Institute of Technology, Stockholm, Sweden; Laboratory of Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO, United States; Southwest Research Institute, San Antonio, TX, United States
推荐引用方式 GB/T 7714	Tang B.-B.,Li W.Y.,Graham D.B.,et al. Lower Hybrid Waves at the Magnetosheath Separatrix Region[J],2020,47(20).
APA	Tang B.-B..,Li W.Y..,Graham D.B..,Wang C..,Khotyaintsev Y.V..,...&Burch J.L..(2020).Lower Hybrid Waves at the Magnetosheath Separatrix Region.Geophysical Research Letters,47(20).
MLA	Tang B.-B.,et al."Lower Hybrid Waves at the Magnetosheath Separatrix Region".Geophysical Research Letters 47.20(2020).