Possible Detection of Torsional Alfvén Waves within an Interplanetary Magnetic Cloud

doi:10.3847/2041-8213/ab108c

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	Possible Detection of Torsional Alfvén Waves within an Interplanetary Magnetic Cloud
	Guo,Jianpeng 4,5,6,7; Wang,Zehao 3,6; Feng,Xueshang 6; Li,Bo 2; Shi,Mijie 2; Huang,Hui 7; Lin,Haibo 7; Yang,Lei 1,6; Liu,Chaoxu 6; Zhong,Jiayong 7
刊名	The Astrophysical Journal Letters
	2019-04-01
卷号	874 期号:2
关键词	magnetohydrodynamics (MHD) solar wind waves
ISSN号	2041-8205
DOI	10.3847/2041-8213/ab108c
英文摘要	Abstract Although it is believed that Alfvén waves can be present in the form of torsional modes in interplanetary magnetic flux ropes, convincing observational evidence remains elusive. In this Letter, we report the detection of Alfvén waves embedded within an interplanetary magnetic cloud (MC) on 2003 March 20, which exhibited features quite different from those upstream and downstream. The magnetic field inside the MC underwent alternate rotations along an arc through a relatively small angle in the plane perpendicular to the minimum variance direction, which seems consistent with the appearance of torsional modes. A significant poloidal motion of plasma existed in the MC, thus it is possible that the field-aligned helical plasma flow was mixed with Alfvén waves exhibiting high correlation between plasma velocity and the magnetic field.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:2041-8205-874-2-AB108C
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/28830]
专题	中国科学院国家天文台
作者单位	1.CAS Key Laboratory of Planetary Sciences, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210034, People’s Republic of China 2.Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai 264209, People’s Republic of China 3.College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China 4.Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, People’s Republic of China 5.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People’s Republic of China 6.SIGMA Weather Group, State Key Laboratory of Space Weather, NSSC, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China fengx@spaceweather.ac.cn 7.Planetary and Space Physics Group, Department of Astronomy, Beijing Normal University, Beijing 100875, People’s Republic of China; jpguo@bnu.edu.cn
推荐引用方式 GB/T 7714	Guo,Jianpeng,Wang,Zehao,Feng,Xueshang,et al. Possible Detection of Torsional Alfvén Waves within an Interplanetary Magnetic Cloud[J]. The Astrophysical Journal Letters,2019,874(2).
APA	Guo,Jianpeng.,Wang,Zehao.,Feng,Xueshang.,Li,Bo.,Shi,Mijie.,...&Wan,Weixing.(2019).Possible Detection of Torsional Alfvén Waves within an Interplanetary Magnetic Cloud.The Astrophysical Journal Letters,874(2).
MLA	Guo,Jianpeng,et al."Possible Detection of Torsional Alfvén Waves within an Interplanetary Magnetic Cloud".The Astrophysical Journal Letters 874.2(2019).