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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 PublicationThe Astrophysical Journal
ISSN0004-637X
Volume884Issue:1
AbstractAbstract Plasma 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 alpha–proton differential flow . As 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 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
Language英语
WOS IDIOP:0004-637X-884-1-ab3d35
PublisherThe American Astronomical Society
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/28310
Collection中国科学院紫金山天文台
Affiliation1.Institute of Space Physics, Luoyang Normal University, Luoyang, People's Republic of China
2.Henan Key Laboratory of Electromagnetic Transformation and Detection, Luoyang, People's Republic of China
3.State Key Laboratory of Space Weather, National Space Science Center, CAS, Beijing, People's Republic of China
4.University of Chinese Academy of Sciences, Beijing, People's Republic of China
5.Purple Mountain Observatory, CAS, Nanjing, People's Republic of China
Recommended Citation
GB/T 7714
Zhao,G. Q.,Li,H.,Feng,H. Q.,等. Effects of Alpha–Proton Differential Flow on Proton Temperature Anisotropy Instabilities in the Solar Wind: Wind Observations[J]. The Astrophysical Journal,2019,884(1).
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.The Astrophysical Journal,884(1).
MLA Zhao,G. Q.,et al."Effects of Alpha–Proton Differential Flow on Proton Temperature Anisotropy Instabilities in the Solar Wind: Wind Observations".The Astrophysical Journal 884.1(2019).
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