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VARIATIONS OF SOLAR ROTATION AND SUNSPOT ACTIVITY
Li KJ(李可军)1,2; Shi XJ(石祥军)1,3; Liang, HF4; Zhan, LS5; Xie, JL1,3; Feng, W6; Li, KJ (reprint author), CAS, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
Source PublicationASTROPHYSICAL JOURNAL
2011-03-20
Volume730Issue:1
DOI10.1088/0004-637X/730/1/49
Contribution Rank第1完成单位
Indexed BySCI
KeywordSun: Activity Sun: Rotation Sunspots
AbstractThe continuous wavelet transformation is used to study the temporal variations of the rotational cycle length of daily sunspot numbers from 1849 January 1 to 2010 February 28, from a global point of view. The rotational cycle length of the Sun is found to have a secular trend, which statistically shows a linear decrease by about 0.47 days during the time interval considered. The empirical mode decomposition analysis of the temporal variations of the rotational cycle length shows an acceleration trend for the surface rotation rate from cycles 11 to 19, but a deceleration trend from the beginning of cycle 20 onward. We cannot determine whether the rotation rate around the maximum times of the Schwable cycles should be faster or slower than that around the minimum times, implying no Schwable cycle in the long-term variations of rotation. The results obtained are compared to those from the literature. It is inferred that the variation of the rotational cycle length may be related to the variation of sunspot activity in the long run.
Funding OrganizationNSFC [10873032, 10921303, 11073010, 40636031] ; National Key Research Science Foundation [2011CB811406] ; Chinese Academy of Sciences
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-637X
URL查看原文
Archive Date2011-04-07
WOS IDWOS:000288453600048
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordDIFFERENTIAL ROTATION ; TORSIONAL OSCILLATIONS ; TEMPORAL VARIATIONS ; CONVECTION ZONE ; MOUNT WILSON ; TIME-SERIES ; CYCLE ; VELOCITY ; DECOMPOSITION ; TRANSFORM
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6182
Collection太阳物理研究组
Corresponding AuthorLi, KJ (reprint author), CAS, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
Affiliation1.National Astronomical Observatories/Yunnan Observatory, CAS, Kunming 650011, China
2.Key Laboratory of Solar Activity, National Astronomical Observatories, CAS, Beijing 100012, China
3.Graduate School of CAS, Beijing 100863, China
4.Department of Physics, Yunnan Normal University, Kunming 650093, China
5.Jingdezhen Ceramic Institute, Jingdezhen 333001, Jiangxi, China
6.Research Center of Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li KJ,Shi XJ,Liang, HF,et al. VARIATIONS OF SOLAR ROTATION AND SUNSPOT ACTIVITY[J]. ASTROPHYSICAL JOURNAL,2011,730(1).
APA Li KJ.,Shi XJ.,Liang, HF.,Zhan, LS.,Xie, JL.,...&Li, KJ .(2011).VARIATIONS OF SOLAR ROTATION AND SUNSPOT ACTIVITY.ASTROPHYSICAL JOURNAL,730(1).
MLA Li KJ,et al."VARIATIONS OF SOLAR ROTATION AND SUNSPOT ACTIVITY".ASTROPHYSICAL JOURNAL 730.1(2011).
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