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Effects of Alpha-Proton Differential Flow on Proton Temperature Anisotropy Instabilities in the Solar Wind: Wind Observations
Zhao, G. Q.1,2; Li, H.3,4; Feng, H. Q.1; Wu, D. J.5; Li, H. B.1; Zhao, A.1
2019-10-10
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume884Issue:1Pages:6
Corresponding AuthorZhao, G. Q.()
AbstractPlasma kinetic waves and alpha-proton differential flow are two important subjects on the topic of solar wind evolution. Based on the Wind data during 2005-2015, this paper reports that the occurrence of electromagnetic cyclotron waves (ECWs) near the proton cyclotron frequency significantly depends on the direction of alphaproton differential flow V-d. As V-d rotates from the anti-Sunward direction to the Sunward direction, the occurrence rate of ECWs as well as the percentage of left-handed (LH) polarized ECWs decreases considerably. In particular, it is shown that the dominant polarization changes from LH polarization to right-handed polarization during the rotation. The investigation on proton and alpha particle parameters ordered by the direction of V-d further illustrates that large kinetic energies of alpha-proton differential flow correspond to high occurrence rates of ECWs. These results are consistent with theoretical predictions for effects of alpha-proton differential flow on proton temperature anisotropy instabilities.
Keywordinstabilities interplanetary medium solar wind waves
DOI10.3847/1538-4357/ab3d35
WOS KeywordCYCLOTRON HARMONIC RESONANCES ; CORONAL HOLES ; WAVES ; HELIUM ; DRIVEN ; IONS ; MAGNETOSHEATH ; ACCELERATION ; GENERATION ; STEREO
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000501620100005
PublisherIOP PUBLISHING LTD
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/35292
Collection中国科学院紫金山天文台
Corresponding AuthorZhao, G. Q.
Affiliation1.Luoyang Normal Univ, Inst Space Phys, Luoyang, Peoples R China
2.Henan Key Lab Electromagnet Transformat & Detect, Luoyang, Peoples R China
3.Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing, Peoples R China
4.Univ Chinese Acad Sci, Beijing, Peoples R China
5.Chinese Acad Sci, Purple Mt Observ, Nanjing, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Zhao, G. Q.,Li, H.,Feng, H. Q.,et al. Effects of Alpha-Proton Differential Flow on Proton Temperature Anisotropy Instabilities in the Solar Wind: Wind Observations[J]. ASTROPHYSICAL JOURNAL,2019,884(1):6.
APA Zhao, G. Q.,Li, H.,Feng, H. Q.,Wu, D. J.,Li, H. B.,&Zhao, A..(2019).Effects of Alpha-Proton Differential Flow on Proton Temperature Anisotropy Instabilities in the Solar Wind: Wind Observations.ASTROPHYSICAL JOURNAL,884(1),6.
MLA Zhao, G. Q.,et al."Effects of Alpha-Proton Differential Flow on Proton Temperature Anisotropy Instabilities in the Solar Wind: Wind Observations".ASTROPHYSICAL JOURNAL 884.1(2019):6.
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