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Statistical Study of Low-Frequency Electromagnetic Cyclotron Waves in the Solar Wind at 1 AU
Zhao, G. Q.1,2; Feng, H. Q.1; Wu, D. J.3; Liu, Q.1; Zhao, Y.1; Zhao, A.1; Huang, J.2
2018-03-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
ISSN2169-9380
Volume123Issue:3Pages:1715-1730
AbstractElectromagnetic cyclotron waves (ECWs) near the proton cyclotron frequency are common wave activities in the solar wind and have attracted much attention in recent years. This paper investigates 82,809 ECWs based on magnetic field data from the Solar Terrestrial Relations Observatory-A mission between 2007 and 2013. Results show that ECWs may last for just a few seconds or incessantly for several tens of minutes. The time fraction of ECW storms among all solar wind is about 0.9%; the storms are obtained with the duration threshold of 10 min, amplitude criterion of 0.032 nT, and time separation limit of 3 min for combination of intermittent ECWs. Most of ECWs have their amplitudes less than 1 nT, while some ECWs have large amplitudes comparable to the ambient magnetic field. The distributions of the durations and amplitudes of these ECWs are characterized by power law spectra, respectively, with spectrum indexes around 4. Statistically, there seems to be a tendency that ECWs with a longer duration will have a larger amplitude. Observed ECW properties are time dependent, and the median frequency of left-hand ECWs can be lower than that of right-hand ECWs in some months in the spacecraft frame. The percentage of left-hand ECWs varies in a large range with respect to months; it is much low (26%) in a month, though it frequently exceeds 50% in other months. Characteristics of ECWs with concurrent polarizations are also researched. The present study should be of importance for a more complete picture of ECWs in the solar wind.
Funding OrganizationNSFC ; NSFC ; Key Scientific Research Project in Universities of Henan Province ; Key Scientific Research Project in Universities of Henan Province ; Key Laboratory of Solar Activity at CAS NAO ; Key Laboratory of Solar Activity at CAS NAO ; Plan For Scientific Innovation Talent of Henan Province ; Plan For Scientific Innovation Talent of Henan Province ; NSFC ; NSFC ; Key Scientific Research Project in Universities of Henan Province ; Key Scientific Research Project in Universities of Henan Province ; Key Laboratory of Solar Activity at CAS NAO ; Key Laboratory of Solar Activity at CAS NAO ; Plan For Scientific Innovation Talent of Henan Province ; Plan For Scientific Innovation Talent of Henan Province ; NSFC ; NSFC ; Key Scientific Research Project in Universities of Henan Province ; Key Scientific Research Project in Universities of Henan Province ; Key Laboratory of Solar Activity at CAS NAO ; Key Laboratory of Solar Activity at CAS NAO ; Plan For Scientific Innovation Talent of Henan Province ; Plan For Scientific Innovation Talent of Henan Province ; NSFC ; NSFC ; Key Scientific Research Project in Universities of Henan Province ; Key Scientific Research Project in Universities of Henan Province ; Key Laboratory of Solar Activity at CAS NAO ; Key Laboratory of Solar Activity at CAS NAO ; Plan For Scientific Innovation Talent of Henan Province ; Plan For Scientific Innovation Talent of Henan Province
DOI10.1002/2017JA024979
WOS KeywordWHISTLER-MODE WAVES ; INTERPLANETARY SHOCKS ; PLASMA INSTABILITIES ; STEREO ; CORONA ; MAGNETOSPHERE ; ACCELERATION ; GENERATION ; MISSION ; ENERGY
Language英语
Funding ProjectNSFC[41504131] ; NSFC[41674170] ; NSFC[41531071] ; NSFC[11373070] ; Key Scientific Research Project in Universities of Henan Province[17A170002] ; Key Scientific Research Project in Universities of Henan Province[16A140016] ; Key Laboratory of Solar Activity at CAS NAO[KLSA201703] ; Plan For Scientific Innovation Talent of Henan Province
Funding OrganizationNSFC ; NSFC ; Key Scientific Research Project in Universities of Henan Province ; Key Scientific Research Project in Universities of Henan Province ; Key Laboratory of Solar Activity at CAS NAO ; Key Laboratory of Solar Activity at CAS NAO ; Plan For Scientific Innovation Talent of Henan Province ; Plan For Scientific Innovation Talent of Henan Province ; NSFC ; NSFC ; Key Scientific Research Project in Universities of Henan Province ; Key Scientific Research Project in Universities of Henan Province ; Key Laboratory of Solar Activity at CAS NAO ; Key Laboratory of Solar Activity at CAS NAO ; Plan For Scientific Innovation Talent of Henan Province ; Plan For Scientific Innovation Talent of Henan Province ; NSFC ; NSFC ; Key Scientific Research Project in Universities of Henan Province ; Key Scientific Research Project in Universities of Henan Province ; Key Laboratory of Solar Activity at CAS NAO ; Key Laboratory of Solar Activity at CAS NAO ; Plan For Scientific Innovation Talent of Henan Province ; Plan For Scientific Innovation Talent of Henan Province ; NSFC ; NSFC ; Key Scientific Research Project in Universities of Henan Province ; Key Scientific Research Project in Universities of Henan Province ; Key Laboratory of Solar Activity at CAS NAO ; Key Laboratory of Solar Activity at CAS NAO ; Plan For Scientific Innovation Talent of Henan Province ; Plan For Scientific Innovation Talent of Henan Province
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000430125300002
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/37157
Collection中国科学院国家天文台
Corresponding AuthorFeng, H. Q.
Affiliation1.Luoyang Normal Univ, Inst Space Phys, Luoyang, Peoples R China
2.Natl Astron Observ, CAS Key Lab Solar Act, Beijing, Peoples R China
3.Chinese Acad Sci, Purple Mt Observ, Nanjing, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Zhao, G. Q.,Feng, H. Q.,Wu, D. J.,et al. Statistical Study of Low-Frequency Electromagnetic Cyclotron Waves in the Solar Wind at 1 AU[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2018,123(3):1715-1730.
APA Zhao, G. Q..,Feng, H. Q..,Wu, D. J..,Liu, Q..,Zhao, Y..,...&Huang, J..(2018).Statistical Study of Low-Frequency Electromagnetic Cyclotron Waves in the Solar Wind at 1 AU.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,123(3),1715-1730.
MLA Zhao, G. Q.,et al."Statistical Study of Low-Frequency Electromagnetic Cyclotron Waves in the Solar Wind at 1 AU".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 123.3(2018):1715-1730.
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