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Multispacecraft Observation of Unidirectional and Bidirectional Alfven Waves within Large-scale Magnetic Clouds
Alternative TitleWOS:000518385600018
Wang, Zehao1; Feng, Xueshang; Zheng, Jianchuan2
Source PublicationASTROPHYSICAL JOURNAL LETTERS
2019
Volume887Issue:1Pages:L18
DOI10.3847/2041-8213/ab595d
ISSN2041-8205
Language英语
KeywordCORONAL MASS EJECTIONS MODEL FIELD FLUCTUATIONS RECONNECTION EVOLUTION ARRIVAL PLASMA LOOP
AbstractRecent years have seen growing evidence of the existence of Alfven waves within interplanetary magnetic flux ropes, which are believed to be an important aspect of dynamics connecting the Sun and the heliosphere. Previous studies, due to localized observation by single spacecraft, focused on sunward or antisunward Alfven waves propagating along with magnetic field lines. In this Letter, for the first time, we use multispacecraft observations to verify and analyze two large-scale magnetic clouds (MCs), when the spacecraft had quite different spatial separations. What surprises us is that not only unidirectional but bidirectional Alfven waves exist in the large-scale MC, which is rooted to the Sun. We speculate that unidirectional Alfven waves within an MC are generated by distortions produced within a preexisting flux rope, and bidirectional Alfven waves are emitted from the center of reconnection and then travel outward along with two loop legs of an MC.
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/7583
Collection中国科学院国家空间科学中心
Affiliation1.Chinese Acad Sci, SIGMA Weather Grp, State Key Lab Space Weather, NSSC, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
3.Shenzhen Natl Climate Observ, Shenzhen Astron Observ, Shenzhen 518040, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Wang, Zehao,Feng, Xueshang,Zheng, Jianchuan. Multispacecraft Observation of Unidirectional and Bidirectional Alfven Waves within Large-scale Magnetic Clouds[J]. ASTROPHYSICAL JOURNAL LETTERS,2019,887(1):L18.
APA Wang, Zehao,Feng, Xueshang,&Zheng, Jianchuan.(2019).Multispacecraft Observation of Unidirectional and Bidirectional Alfven Waves within Large-scale Magnetic Clouds.ASTROPHYSICAL JOURNAL LETTERS,887(1),L18.
MLA Wang, Zehao,et al."Multispacecraft Observation of Unidirectional and Bidirectional Alfven Waves within Large-scale Magnetic Clouds".ASTROPHYSICAL JOURNAL LETTERS 887.1(2019):L18.
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