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ENSEMBLE EMPIRICAL MODE DECOMPOSITION OF THE MAGNETIC FIELD OF THE SUN AS A STAR
Xiang NB(向南彬)1,2,3; Qu, Z. N.4
Source PublicationASTRONOMICAL JOURNAL
2016-03-01
Volume151Issue:3
DOI10.3847/0004-6256/151/3/76
Contribution Rank第1完成单位
Indexed BySCI
KeywordSun: Activity Sun: General Sun: Magnetic Fields
Abstract

The ensemble empirical mode decomposition (EEMD) analysis is utilized to extract the intrinsic mode functions (IMFs) of the solar mean magnetic field (SMMF) observed at the Wilcox Solar Observatory of Stanford University from 1975 to 2014, and then we analyze the periods of these IMFs as well as the relation of IMFs (SMMF) with some solar activity indices. The two special rotation cycles of 26.6 and 28.5 days should be derived from different magnetic flux elements in the SMMF. The rotation cycle of the weak magnetic flux element in the SMMF is 26.6 days, while the rotation cycle of the strong magnetic flux element in the SMMF is 28.5 days. The two rotation periods of the structure of the interplanetary magnetic field near the ecliptic plane are essentially related to weak and strong magnetic flux elements in the SMMF, respectively. The rotation cycle of weak magnetic flux in the SMMF did not vary over the last 40 years because the weak magnetic flux element derived from the weak magnetic activity on the full disk is not influenced by latitudinal migration. Neither the internal rotation of the Sun nor the solar magnetic activity on the disk (including the solar polar fields) causes the annual variation of SMMF. The variation of SMMF at timescales of a solar cycle is more related to weak magnetic activity on the full solar disk.

Funding ProjectNational Natural Science Foundation of China[11273057] ; National Natural Science Foundation of China[11573065] ; National Natural Science Foundation of China[11503082] ; 973 programs[2012CB957801] ; Foundation of Sichuan University of Science and Engineering[2015RC43] ; Chinese Academy of Sciences
Funding OrganizationNational Natural Science Foundation of China[11273057, 11573065, 11503082] ; 973 programs[2012CB957801] ; Foundation of Sichuan University of Science and Engineering[2015RC43] ; Chinese Academy of Sciences
Language英语
Subject Area天文学 ; 太阳与太阳系 ; 太阳物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-6256
URL查看原文
Archive Date2016-12-30
WOS IDWOS:000371249100028
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordLATITUDE SOLAR-ACTIVITY ; WAVELET TRANSFORM ; TIME-SERIES ; PERIODICITY ; IRRADIANCE ; SIMULATIONS ; VARIABILITY ; INDEXES ; PHASE
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9349
Collection太阳物理研究组
Corresponding AuthorQu, Z. N.
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
2.University of Chinese Academy of Sciences, Beijing 100049, China
3.Key Laboratory of Solar Activity, National Astronomical Observatories, CAS, Beijing 100012, China
4.Department of Physics, School of Science, Sichuan University of Science and Engineering, Zigong 643000, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Xiang NB,Qu, Z. N.. ENSEMBLE EMPIRICAL MODE DECOMPOSITION OF THE MAGNETIC FIELD OF THE SUN AS A STAR[J]. ASTRONOMICAL JOURNAL,2016,151(3).
APA Xiang NB,&Qu, Z. N..(2016).ENSEMBLE EMPIRICAL MODE DECOMPOSITION OF THE MAGNETIC FIELD OF THE SUN AS A STAR.ASTRONOMICAL JOURNAL,151(3).
MLA Xiang NB,et al."ENSEMBLE EMPIRICAL MODE DECOMPOSITION OF THE MAGNETIC FIELD OF THE SUN AS A STAR".ASTRONOMICAL JOURNAL 151.3(2016).
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