NAOC Open IR  > 星系宇宙学研究部
VARIATIONS OF SOLAR ROTATION AND SUNSPOT ACTIVITY
Li, K. J.1,2; Shi, X. J.1,3; Liang, H. F.4; Zhan, L. S.5; Xie, J. L.1,3; Feng, W.6
2011-03-20
Source PublicationASTROPHYSICAL JOURNAL
Volume730Issue:1
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.
KeywordSun: Activity Sun: Rotation Sunspots
DOI10.1088/0004-637X/730/1/49
Indexed BySCI
Language英语
WOS IDWOS:000288453600048
Citation statistics
Cited Times:21[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8058
Collection星系宇宙学研究部
Affiliation1.CAS, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China
2.CAS, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China
3.CAS, Grad Sch, Beijing 100863, Peoples R China
4.Yunnan Normal Univ, Dept Phys, Kunming 650093, Peoples R China
5.Jingdezhen Ceram Inst, Jingdezhen 333001, Jiangxi, Peoples R China
6.Kunming Univ Sci & Technol, Res Ctr Anal & Measurement, Kunming 650093, Peoples R China
Recommended Citation
GB/T 7714
Li, K. J.,Shi, X. J.,Liang, H. F.,et al. VARIATIONS OF SOLAR ROTATION AND SUNSPOT ACTIVITY[J]. ASTROPHYSICAL JOURNAL,2011,730(1).
APA Li, K. J.,Shi, X. J.,Liang, H. F.,Zhan, L. S.,Xie, J. L.,&Feng, W..(2011).VARIATIONS OF SOLAR ROTATION AND SUNSPOT ACTIVITY.ASTROPHYSICAL JOURNAL,730(1).
MLA Li, K. J.,et al."VARIATIONS OF SOLAR ROTATION AND SUNSPOT ACTIVITY".ASTROPHYSICAL JOURNAL 730.1(2011).
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