气候变化领域集成服务门户(CCPortal): Ion-Scale Flux Rope Observed inside a Hot Flow Anomaly

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DOI	10.1029/2019GL085933
	Ion-Scale Flux Rope Observed inside a Hot Flow Anomaly
	Bai S.-C.; Shi Q.; Liu T.Z.; Zhang H.; Yue C.; Sun W.-J.; Tian A.; Degeling A.W.; Bortnik J.; Rae I.J.; Wang M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:5
英文摘要	We report an earthward moving ion-scale flux rope embedded within the trailing edge of a hot flow anomaly (HFA) observed by the Magnetospheric Multiscale satellite constellation on 17 December 2016 upstream of Earth's quasi-parallel bow shock. The driver of the HFA, a tangential discontinuity, was observed by the Wind spacecraft without flux rope signatures around it in the solar wind. This suggests that the earthward moving flux rope was generated inside the HFA. This ion-scale flux rope is not a force free structure and expands due to a strong magnetic pressure gradient force. Solar wind ions are decelerated inside the flux rope by the static electric field likely caused by the charge separation of solar wind particles. Our observations imply that magnetic reconnection may have occurred inside the HFA. Reconnection and flux ropes may play a role in particle acceleration/heating inside foreshock transients. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Electric fields; Ions; Magnetism; Magnetosphere; Solar wind; Earthward moving flux rope; Flux ropes; Hot flow anomaly; Magnetic reconnections; Magnetospheric multi scale; Satellite constellations; Static electric fields; Tangential discontinuities; Rope; acceleration; anomaly; electric field; foreshock; heat flow; pressure gradient; satellite constellation; separation; solar wind; spacecraft
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/170612
作者单位	Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Institute of Space Sciences, Shandong University, Weihai, China; Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States; University Corporation for Atmospheric Research, Boulder, CO, United States; Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, CA, United States; Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, United States; Institute of Space Physics and Applied Technology, Peking University, Beijing, China; Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, United States; Mullard Space Science Laboratory, Space and Climate Physics, University College London, United Kingdom
推荐引用方式 GB/T 7714	Bai S.-C.,Shi Q.,Liu T.Z.,et al. Ion-Scale Flux Rope Observed inside a Hot Flow Anomaly[J],2020,47(5).
APA	Bai S.-C..,Shi Q..,Liu T.Z..,Zhang H..,Yue C..,...&Wang M..(2020).Ion-Scale Flux Rope Observed inside a Hot Flow Anomaly.Geophysical Research Letters,47(5).
MLA	Bai S.-C.,et al."Ion-Scale Flux Rope Observed inside a Hot Flow Anomaly".Geophysical Research Letters 47.5(2020).