Possible Detection of Torsional Alfven 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
Corresponding AuthorFeng, Xueshang(
AbstractAlthough it is believed that Alfven 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 Alfven 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 Alfven waves exhibiting high correlation between plasma velocity and the magnetic field.
Keywordmagnetohydrodynamics (MHD) solar wind waves
Indexed BySCI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000463138900001
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorFeng, Xueshang
Affiliation1.Beijing Normal Univ, Dept Astron, Planetary & Space Phys Grp, Beijing 100875, Peoples R China
2.Chinese Acad Sci, SIGMA Weather Grp, State Key Lab Space Weather, NSSC, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
5.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
6.Shandong Univ, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Inst Space Sci, Weihai 264209, Peoples R China
7.Chinese Acad Sci, CAS Key Lab Planetary Sci, Purple Mt Observ, Nanjing 210034, Jiangsu, Peoples R China
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GB/T 7714
Guo, Jianpeng,Wang, Zehao,Feng, Xueshang,et al. Possible Detection of Torsional Alfven Waves within an Interplanetary Magnetic Cloud[J]. ASTROPHYSICAL JOURNAL LETTERS,2019,874(2):8.
APA Guo, Jianpeng.,Wang, Zehao.,Feng, Xueshang.,Li, Bo.,Shi, Mijie.,...&Wan, Weixing.(2019).Possible Detection of Torsional Alfven Waves within an Interplanetary Magnetic Cloud.ASTROPHYSICAL JOURNAL LETTERS,874(2),8.
MLA Guo, Jianpeng,et al."Possible Detection of Torsional Alfven Waves within an Interplanetary Magnetic Cloud".ASTROPHYSICAL JOURNAL LETTERS 874.2(2019):8.
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