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North-South Asymmetry of the Rotation of the Solar Magnetic Field
Xie JL(谢婧岚)1,2,3,4; Shi XJ(石祥军)1,3,4; Qu, Zhining3,5
Source PublicationASTROPHYSICAL JOURNAL
2018-03-10
Volume855Issue:2
DOI10.3847/1538-4357/aaae68
Contribution Rank第1完成单位
Indexed BySCI
KeywordMethods: Data Analysis Sun: Magnetic Fields Sun: Rotation
Abstract

Using the rotation rates of the solar magnetic field during solar cycles 21 to 23 obtained by Chu et al. by analyzing the synoptic magnetic maps produced by the NSO/Kitt Peak and SOHO/MDI during the years 1975 to 2008, the temporal variation of the equatorial rotation rate (A) and the latitude gradient of rotation (B) in the northern and southern hemispheres are studied separately. The results indicate that the rotation is more differential (about 4.3%) in the southern hemisphere in the considered time frame. It is found that the north-south asymmetry of A and the asymmetry of B show increasing trends in the considered time frame, while the north-south asymmetry of the solar activity shows a decreasing trend. There exists a significant negative correlation (at 95% confidence level) between the asymmetry of B and the asymmetry of the solar activity, and this may be due to stronger magnetic activity in a certain hemisphere that may suppress the differential rotation to some extent. The periodicities in the variation of A and B are also studied, and periods of about 5.0 and 10.5 yr (5.5 and 10.4 yr) can be found for the variation of the northern (southern) hemisphere B. Moreover, the north-south asymmetry of A and the asymmetry of B have similar periods of about 2.6-2.7 and 5.2-5.3 yr. Further, cross-correlation analysis indicates that there exists a phase difference (about eight months) between the northern and southern hemisphere B, and this means that the northern hemisphere B generally leads by about eight months.

Funding ProjectNational Natural Science Foundation of China[11573065] ; National Natural Science Foundation of China[11503082] ; National Natural Science Foundation of China[11673061] ; National Natural Science Foundation of China[11633008] ; National Natural Science Foundation of China[11703085] ; Applied Basic Research Foundation of Yunnan Province, China[2014FB190] ; Collaborating Research Program of CAS Key Laboratory of Solar Activity[KLSA201613] ; Collaborating Research Program of CAS Key Laboratory of Solar Activity[KLSA201711] ; Foundation of Sichuan University of Science and Engineering grant[2015RC43] ; Center for Astronomical Mega-Science ; Chinese Academy of Sciences
Funding OrganizationNational Natural Science Foundation of China[11573065, 11503082, 11673061, 11633008, 11703085] ; Applied Basic Research Foundation of Yunnan Province, China[2014FB190] ; Collaborating Research Program of CAS Key Laboratory of Solar Activity[KLSA201613, KLSA201711] ; Foundation of Sichuan University of Science and Engineering grant[2015RC43] ; Center for Astronomical Mega-Science ; Chinese Academy of Sciences
Language英语
Subject Area天文学 ; 太阳与太阳系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000431812800011
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordN-s Asymmetry ; Hemispheric Sunspot Activity ; Wavelet Transform Analyses ; Long-term Variation ; Numbers R-n ; Differential Rotation ; Flare Index ; Activity Cycles ; Temporal Variation ; Coronal Rotation
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/12358
Collection抚仙湖太阳观测站
Corresponding AuthorXie JL(谢婧岚); Shi XJ(石祥军)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, People's Republic of China
2.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
3.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China
4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100012, People's Republic of China
5.School of Physics and Electronic Engineering, Sichuan University of Science & Engineering, Zigong 643000, People's Republic of China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Xie JL,Shi XJ,Qu, Zhining. North-South Asymmetry of the Rotation of the Solar Magnetic Field[J]. ASTROPHYSICAL JOURNAL,2018,855(2).
APA Xie JL,Shi XJ,&Qu, Zhining.(2018).North-South Asymmetry of the Rotation of the Solar Magnetic Field.ASTROPHYSICAL JOURNAL,855(2).
MLA Xie JL,et al."North-South Asymmetry of the Rotation of the Solar Magnetic Field".ASTROPHYSICAL JOURNAL 855.2(2018).
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