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Latitudinal migration of sunspots based on the ESAI database
Zhang J(张娟)1,3,4; Li FY(李富羽)1,3,5; Feng, Wen2
发表期刊RESEARCH IN ASTRONOMY AND ASTROPHYSICS
2018
卷号18期号:1
DOI10.1088/1674-4527/18/1/7
产权排序第1完成单位
收录类别SCI
关键词Sun: Activity Sun: General Sun: Sunspots Methods: Data Analysis
摘要

The latitudinal migration of sunspots toward the equator, which implies there is propagation of the toroidal magnetic flux wave at the base of the solar convection zone, is one of the crucial observational bases for the solar dynamo to generate a magnetic field by shearing of the pre-existing poloidal magnetic field through differential rotation. The Extended time series of Solar Activity Indices (ESAI) elongated the Greenwich observation record of sunspots by several decades in the past. In this study, ESAI's yearly mean latitude of sunspots in the northern and southern hemispheres during the years 1854 to 1985 is utilized to statistically test whether hemispherical latitudinal migration of sunspots in a solar cycle is linear or nonlinear. It is found that a quadratic function is statistically significantly better at describing hemispherical latitudinal migration of sunspots in a solar cycle than a linear function. In addition, the latitude migration velocity of sunspots in a solar cycle decreases as the cycle progresses, providing a particular constraint for solar dynamo models. Indeed, the butterfly wing pattern with a faster latitudinal migration rate should present stronger solar activity with a shorter cycle period, and it is located at higher latitudinal position, giving evidence to support the Babcock-Leighton dynamo mechanism.

资助项目National Natural Science Foundation of China[11573065] ; National Natural Science Foundation of China[11633008] ; Specialized Research Fund for State Key Laboratories ; Chinese Academy of Sciences
项目资助者National Natural Science Foundation of China[11573065, 11633008] ; Specialized Research Fund for State Key Laboratories ; Chinese Academy of Sciences
语种英语
学科领域天文学 ; 太阳与太阳系
学科门类理学 ; 理学::天文学
文章类型Article
出版者NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
出版地20A DATUN RD, CHAOYANG, BEIJING, 100012, PEOPLES R CHINA
ISSN1674-4527
URL查看原文
WOS记录号WOS:000428267100007
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]DOUBLE MAGNETIC CYCLE ; SOLAR ACTIVE REGIONS ; MEAN-FIELD ALPHA ; DYNAMO ; MODEL ; CONVECTION ; FILAMENTS ; SURFACE ; SUN
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/12302
专题抚仙湖太阳观测和研究基地
通讯作者Feng, Wen
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
2.Research Center of Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, China
3.University of Chinese Academy of Sciences, Beijing 100049, China
4.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
5.State Key Laboratory of Space Weather, Chinese Academy of Sciences, Beijing 100190, China
第一作者单位中国科学院云南天文台
推荐引用方式
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Zhang J,Li FY,Feng, Wen. Latitudinal migration of sunspots based on the ESAI database[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2018,18(1).
APA Zhang J,Li FY,&Feng, Wen.(2018).Latitudinal migration of sunspots based on the ESAI database.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,18(1).
MLA Zhang J,et al."Latitudinal migration of sunspots based on the ESAI database".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 18.1(2018).
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