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Low-frequency electromagnetic cyclotron waves in and around magnetic clouds: STEREO observations during 2007-2013
Zhao, G. Q.1; Chu, Y. H.2; Lin, P. H.2; Yang, Y. H.2; Feng, H. Q.1; Wu, D. J.3; Liu, Q.1
2017-05-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
ISSN2169-9380
Volume122Issue:5Pages:4879-4894
Corresponding AuthorFeng, H. Q.(fenghq9921@163.com)
AbstractWave activities in the solar wind are an important topic and magnetic clouds (MCs) are a common phenomenon in interplanetary space, though waves activities associated with MCs have not been well documented. Based on a survey of 120 MCs observed by STEREO spacecraft during the years 2007-2013, this work studies electromagnetic cyclotron waves (ECWs) near the proton cyclotron frequency in and around MCs. For total 7807 ECW events, 24% of them occurred in the regions within MCs while 76% occurred in the regions around MCs. Statistics indicate that ECWs around MCs have higher frequencies, wider bandwidths, and stronger powers relative to the waves in MCs. More ECWs, on the other hand, tend to be related to a plasma with higher temperature, lower density, and larger velocity. In particular, it is found that there exist positive power law correlations between plasma betas and the wave frequencies, bandwidths, and powers. The results imply that the plasma beta should play an important role in determining the properties of ECWs, which is consistent with previous theory studies and the recent simulation results.
Keywordlow frequency waves magnetic clouds
DOI10.1002/2017JA024119
WOS KeywordCORONAL MASS EJECTIONS ; SOLAR-WIND ; 1 AU ; ULYSSES OBSERVATIONS ; HARMONIC RESONANCES ; WHISTLER WAVES ; LANGMUIR-WAVES ; BOW SHOCK ; PLASMA ; ELECTRON
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000403912500002
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22935
Collection中国科学院紫金山天文台
Corresponding AuthorFeng, H. Q.
Affiliation1.Luoyang Normal Univ, Inst Space Phys, Luoyang, Peoples R China
2.Natl Cent Univ, Inst Space Sci, Chungli, Taiwan
3.Chinese Acad Sci, Purple Mt Observ, Nanjing, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Zhao, G. Q.,Chu, Y. H.,Lin, P. H.,et al. Low-frequency electromagnetic cyclotron waves in and around magnetic clouds: STEREO observations during 2007-2013[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2017,122(5):4879-4894.
APA Zhao, G. Q..,Chu, Y. H..,Lin, P. H..,Yang, Y. H..,Feng, H. Q..,...&Liu, Q..(2017).Low-frequency electromagnetic cyclotron waves in and around magnetic clouds: STEREO observations during 2007-2013.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,122(5),4879-4894.
MLA Zhao, G. Q.,et al."Low-frequency electromagnetic cyclotron waves in and around magnetic clouds: STEREO observations during 2007-2013".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 122.5(2017):4879-4894.
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