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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
发表期刊ASTROPHYSICAL JOURNAL
2018-03-10
卷号855期号:2
DOI10.3847/1538-4357/aaae68
产权排序第1完成单位
收录类别SCI
关键词Methods: Data Analysis Sun: Magnetic Fields Sun: Rotation
摘要

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.

项目资助者National 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
语种英语
学科领域天文学
学科门类理学 ; 理学::天文学
文章类型Article
出版者IOP PUBLISHING LTD
ISSN0004-637X
URL查看原文
WOS记录号WOS:000431812800011
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]N-s Asymmetry ; Hemispheric Sunspot Activity ; Wavelet Transform Analyses ; Long-term Variation ; Numbers R-n ; Differential Rotation ; Flare Index ; Activity Cycles ; Temporal Variation ; Coronal Rotation
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/12358
专题抚仙湖太阳观测站
通讯作者Xie JL(谢婧岚); Shi XJ(石祥军)
作者单位1.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
推荐引用方式
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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