Possible Detection of Torsional Alfvén Waves within an Interplanetary Magnetic Cloud
Guo,Jianpeng1,2,3,4; Wang,Zehao2,5; Feng,Xueshang2; Li,Bo6; Shi,Mijie6; Huang,Hui1; Lin,Haibo1; Yang,Lei2,7; Liu,Chaoxu2; Zhong,Jiayong1; Wei,Yong4,5; Yan,Yihua3; Wan,Weixing4,5
Source PublicationThe Astrophysical Journal Letters
AbstractAbstract 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.
Keywordmagnetohydrodynamics (MHD) solar wind waves
WOS IDIOP:2041-8205-874-2-ab108c
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.Planetary and Space Physics Group, Department of Astronomy, Beijing Normal University, Beijing 100875, People’s Republic of China;
2.SIGMA Weather Group, State Key Laboratory of Space Weather, NSSC, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
3.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, 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.College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
6.Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai 264209, People’s Republic of China
7.CAS Key Laboratory of Planetary Sciences, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210034, People’s Republic of China
Recommended Citation
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).
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