ENSEMBLE EMPIRICAL MODE DECOMPOSITION OF THE MAGNETIC FIELD OF THE SUN AS A STAR
文献类型:期刊论文
作者 | Xiang NB(向南彬)1,2,3; Qu, Z. N.4 |
刊名 | ASTRONOMICAL JOURNAL |
出版日期 | 2016-03-01 |
卷号 | 151期号:3 |
ISSN号 | 0004-6256 |
关键词 | Sun: activity Sun: general Sun: magnetic fields |
通讯作者 | Qu, ZN (reprint author), Sichuan Univ Sci & Engn, Sch Sci, Dept Phys, Zigong 643000, Peoples R China. |
产权排序 | 第一完成单位 |
英文摘要 | 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. |
学科主题 | Astronomy & Astrophysics |
WOS标题词 | Science & Technology ; Physical Sciences |
类目[WOS] | Astronomy & Astrophysics |
研究领域[WOS] | Astronomy & Astrophysics |
关键词[WOS] | LATITUDE SOLAR-ACTIVITY ; WAVELET TRANSFORM ; TIME-SERIES ; PERIODICITY ; IRRADIANCE ; SIMULATIONS ; VARIABILITY ; INDEXES ; PHASE |
收录类别 | SCI |
原文出处 | http://iopscience.iop.org/article/10.3847/0004-6256/151/3/76/meta |
语种 | 英语 |
WOS记录号 | WOS:000371249100028 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/9349] |
专题 | 云南天文台_太阳物理研究组 |
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.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 |
推荐引用方式 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). |
入库方式: OAI收割
来源:云南天文台
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