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Identification of the Nature of Electromagnetic Waves near the Proton-cyclotron Frequency in Solar-terrestrial Plasmas
Zhao, Jinsong1; Wang, Tieyan2; Graham, Daniel B.3; He, Jiansen4; Liu, Wen1; Dunlop, Malcolm W.2,5; Wu, Dejin1
2020-02-10
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume890Issue:1Pages:8
Abstract

Low-frequency (quasi-)monochromatic electromagnetic waves near the ion-cyclotron frequency always exhibit both left-hand (LH) and right-hand (RH) polarization in solar-terrestrial spacecraft observations. However, due to the Doppler frequency shift resulting from the bulk flow of charged particles, the nature of these waves in the plasma frame is still unclear. This paper proposes a useful method to directly identify the nature of the observed waves. Using three wave parameters including polarization, direction of the parallel Poynting flux, and correlation between perpendicular magnetic field and perpendicular ion/electron velocity, we could discriminate the wave mode (Alfven/ion-cyclotron wave or fast-magnetosonic/whistler wave) and its propagation direction (along or against the magnetic field) in the plasma frame. Using Magnetospheric Multiscale spacecraft measurements, we analyze two wave events containing both LH- and RH-polarized low-frequency electromagnetic waves in the Earth's magnetosheath, and find that these waves correspond to counter-propagating Alfven/ion-cyclotron waves in the plasma frame. Our method is helpful for studying low-frequency electromagnetic waves detected by satellites that have particle measurements with an adequate temporal resolution.

DOI10.3847/1538-4357/ab672f
WOS KeywordTRANSFORM
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000522095800017
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/35837
Collection中国科学院紫金山天文台
Corresponding AuthorZhao, Jinsong
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Key Lab Planetary Sci, Nanjing 210008, Peoples R China
2.STFC, RAL Space, Didcot OX11 0QX, Oxon, England
3.Swedish Inst Space Phys, Uppsala, Sweden
4.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China
5.Beihang Univ, Sch Space & Environm, Beijing 100191, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Jinsong,Wang, Tieyan,Graham, Daniel B.,et al. Identification of the Nature of Electromagnetic Waves near the Proton-cyclotron Frequency in Solar-terrestrial Plasmas[J]. ASTROPHYSICAL JOURNAL,2020,890(1):8.
APA Zhao, Jinsong.,Wang, Tieyan.,Graham, Daniel B..,He, Jiansen.,Liu, Wen.,...&Wu, Dejin.(2020).Identification of the Nature of Electromagnetic Waves near the Proton-cyclotron Frequency in Solar-terrestrial Plasmas.ASTROPHYSICAL JOURNAL,890(1),8.
MLA Zhao, Jinsong,et al."Identification of the Nature of Electromagnetic Waves near the Proton-cyclotron Frequency in Solar-terrestrial Plasmas".ASTROPHYSICAL JOURNAL 890.1(2020):8.
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