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Viewing the "rush to the poles" through phase analysis
Kong DF(孔德芳)1,2; Xiang NB(向南彬)1,2; Pan, GM3; Kong, DF (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China.
发表期刊PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2014-02
卷号66期号:1页码:1-8
DOI10.1093/pasj/pst029
产权排序第1完成单位
收录类别SCI
关键词Methods: Data Analysis Sun: Activity Sun: Filaments Prominences
摘要At mid and low heliographic latitudes, filament activity shifts equatorward starting from the beginning of the solar cycle. At high latitudes, it migrates poleward. Solar filaments exhibit the "rush to the poles" close to solar maximum, when the solar polar magnetic field reverses polarity. In order to better understand the behavior of the "rush to the poles," we used cross-correlation analysis and wavelet transform methods for investigating the periodic characteristics and the phase relationship between two groups of the solar filaments at high latitudes observed during the period from 1919 March to 1989 December. The length of the solar cycle derived from the continuous wavelet transform is a function of latitude, but still shows a significant 11-yr cycle. The most significant periods of the solar filaments, respectively at higher latitudes than 50 degrees and 60 degrees, are 10.77 and 10.62 yr, using the wavelet transform method. From the cross-correlation analysis, the solar filaments at higher latitudes than 50 degrees have a lead of six months with respect to those at higher latitudes than 60 degrees. Different solar cycles exhibited different phase relationships between the two groups of solar filaments. The analysis of the cross-wavelet transform also indicates that the solar filaments at higher latitudes than 50 degrees lead those at higher latitudes than 60 degrees in the entire time interval. The relationship between the phase difference of the two groups of solar filaments and the intensity of solar activity is also discussed. What is more, the poleward shifting speeds are estimated.
项目资助者National Natural Science Foundation of China (NSFC) [11273057, 11221063, 11373066] ; Key Laboratory of Solar Activity of CAS [KLSA201303] ; 973 programs [2012CB957801, 2011CB811406]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6264
URL查看原文
归档日期2014-03-18
WOS记录号WOS:000339426900029
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]WAVELET TRANSFORM ANALYSES ; LATITUDE SOLAR-ACTIVITY ; CORONAL MASS EJECTIONS ; MAGNETIC-FIELDS ; ACTIVITY CYCLE ; TIME-SERIES ; SUNSPOT ACTIVITY ; MERIDIONAL FLOW ; FLARE ACTIVITY ; FILAMENTS
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6258
专题太阳物理研究组
通讯作者Kong, DF (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China.
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
2.University of Chinese Academy of Sciences, Beijing 100049, China
3.College of Mathematics Physics and Information Engineering, Jiaxing University, Jiaxing 314001, China
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Kong DF,Xiang NB,Pan, GM,et al. Viewing the "rush to the poles" through phase analysis[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2014,66(1):1-8.
APA Kong DF,Xiang NB,Pan, GM,&Kong, DF .(2014).Viewing the "rush to the poles" through phase analysis.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,66(1),1-8.
MLA Kong DF,et al."Viewing the "rush to the poles" through phase analysis".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 66.1(2014):1-8.
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