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Temporal Variation of the Rotation of the Solar Mean Magnetic Field
Xie,J. L.1,2,3,4; Shi,X. J.1,3,4; Xu,J. C.1,2,4,5
2017-03-22
Source PublicationThe Astronomical Journal
ISSN0004-6256
Volume153Issue:4
AbstractAbstract Based on continuous wavelet transformation analysis, the daily solar mean magnetic field (SMMF) from 1975 May 16 to 2014 July 31 is analyzed to reveal its rotational behavior. Both the recurrent plot in Bartels form and the continuous wavelet transformation analysis show the existence of rotational modulation in the variation of the daily SMMF. The dependence of the rotational cycle lengths on solar cycle phase is also studied, which indicates that the yearly mean rotational cycle lengths generally seem to be longer during the rising phase of solar cycles and shorter during the declining phase. The mean rotational cycle length for the rising phase of all of the solar cycles in the considered time is 28.28?±?0.67 days, while for the declining phase it is 27.32?±?0.64 days. The difference of the mean rotational cycle lengths between the rising phase and the declining phase is 0.96 days. The periodicity analysis, through the use of an auto-correlation function, indicates that the rotational cycle lengths have a significant period of about 10.1 years. Furthermore, the cross-correlation analysis indicates that there exists a phase difference between the rotational cycle lengths and solar activity.
Keywordmethods: data analysis Sun: magnetic fields Sun: rotation
DOI10.3847/1538-3881/aa6199
Language英语
WOS IDIOP:0004-6256-153-4-aa6199
PublisherThe American Astronomical Society
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/36078
Collection中国科学院国家天文台
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China; xiejinglan@ynao.ac.cn
2.University of Chinese Academy of Sciences, Beijing 100049, China
3.Key Laboratory of Solar Activity, National Astronomical Observatories, CAS, Beijing 100012, China
4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100012, China
5.State Key Laboratory of Space Weather, Chinese Academy of Sciences, Beijing 100190, China
Recommended Citation
GB/T 7714
Xie,J. L.,Shi,X. J.,Xu,J. C.. Temporal Variation of the Rotation of the Solar Mean Magnetic Field[J]. The Astronomical Journal,2017,153(4).
APA Xie,J. L.,Shi,X. J.,&Xu,J. C..(2017).Temporal Variation of the Rotation of the Solar Mean Magnetic Field.The Astronomical Journal,153(4).
MLA Xie,J. L.,et al."Temporal Variation of the Rotation of the Solar Mean Magnetic Field".The Astronomical Journal 153.4(2017).
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