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INTERNAL-CYCLE VARIATION OF SOLAR DIFFERENTIAL ROTATION
Li KJ(李可军)1,2; Xie JL(谢婧岚)1,3; Shi XJ(石祥军)1,3
Source PublicationASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
2013-06
Volume206Issue:2Pages:1-6
DOI10.1088/0067-0049/206/2/15
Contribution Rank第1完成单位
Indexed BySCI
KeywordSun: Activity Sun: Rotation Sunspots
Abstract

The latitudinal distributions of the yearly mean rotation rates measured by Suzuki in 1998 and 2012 and Pulkkinen & Tuominen in 1998 are utilized to investigate internal-cycle variation of solar differential rotation. The rotation rate at the solar equator seems to have decreased since cycle 10 onward. The coefficient B of solar differential rotation, which represents the latitudinal gradient of rotation, is found to be smaller in the several years after the minimum of a solar cycle than in the several years after the maximum time of the cycle, and it peaks several years after the maximum time of the solar cycle. The internal-cycle variation of the solar rotation rates looks similar in profile to that of the coefficient B. A new explanation is proposed to address such a solar-cycle-related variation of the solar rotation rates. Weak magnetic fields may more effectively reflect differentiation at low latitudes with high rotation rates than at high latitudes with low rotation rates, and strong magnetic fields may more effectively repress differentiation at relatively low latitudes than at high latitudes. The internal-cycle variation is inferred as the result of both the latitudinal migration of the surface torsional pattern and the repression of strong magnetic activity in differentiation.

Funding Project973 programs[2012CB957801] ; 973 programs[2011CB811406] ; National Natural Science Foundation of China[11273057] ; National Natural Science Foundation of China[11221063] ; National Natural Science Foundation of China[11147125] ; National Natural Science Foundation of China[11073010] ; Chinese Academy of Sciences
Funding Organization973 programs[2012CB957801, 2011CB811406] ; National Natural Science Foundation of China[11273057, 11221063, 11147125, 11073010] ; Chinese Academy of Sciences
Language英语
Subject Area天文学 ; 太阳与太阳系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0067-0049
URL查看原文
Archive Date2013-07-10
WOS IDWOS:000325654800006
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordLONG-TERM VARIATIONS ; SUNSPOT GROUPS ; TORSIONAL OSCILLATIONS ; TEMPORAL VARIATIONS ; MERIDIONAL MOTIONS ; CORONAL ROTATION ; CONVECTION ZONE ; MOUNT WILSON ; SUN ; VELOCITY
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6229
Collection太阳物理研究组
Corresponding AuthorLi KJ(李可军)
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
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li KJ,Xie JL,Shi XJ. INTERNAL-CYCLE VARIATION OF SOLAR DIFFERENTIAL ROTATION[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2013,206(2):1-6.
APA Li KJ,Xie JL,&Shi XJ.(2013).INTERNAL-CYCLE VARIATION OF SOLAR DIFFERENTIAL ROTATION.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,206(2),1-6.
MLA Li KJ,et al."INTERNAL-CYCLE VARIATION OF SOLAR DIFFERENTIAL ROTATION".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 206.2(2013):1-6.
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