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题名: THE SHAPE OF SOLAR CYCLES DESCRIBED BY A SIMPLIFIED BINARY MIXTURE OF GAUSSIAN FUNCTIONS
作者: Li, F. Y.; Xiang, N. B.; Kong, D. F.; Xie, J. L.
作者部门: 空间科学部
通讯作者: Li, FY (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China. ; Li, FY (reprint author), Univ Chinese Acad Sci, Beijing 100049, Peoples R China. ; Li, FY (reprint author), Chinese Acad Sci, State Key Lab Space Weather, Beijing 100190, Peoples R China. ; Li, FY (reprint author), Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China.
关键词: methods: statistical ; sunspots
刊名: ASTROPHYSICAL JOURNAL
ISSN号: 0004-637X
出版日期: 2017
卷号: 834, 期号:2, 页码:192
收录类别: SCI
项目资助者: National Natural Science Foundation of China [11573065, 11633008, 11273057, 11603071, 11603069] ; Specialized Research Fund for State Key Laboratories ; Chinese Academy of Sciences
英文摘要: Sunspot cycles usually present a double-peak structure. This work is devoted to using a function to describe the shape of sunspot cycles, including bimodal cycles, and we find that the shape of sunspot cycles can be described by a binary mixture of Gaussian functions with six parameters, two amplitudes, two gradients of curve, and two rising times, and the parameters could be reduced to three. The fitting result of this binary mixture of Gaussian functions is compared with some other functions used previously in the literature, and this function works pretty well, especially at cycle peaks. It is worth mentioning that the function can describe well the shape of those sunspot cycles that show double peaks, and it is superior to the binary mixture of the Laplace functions that was once utilized. The Solar Influences Data Analysis Center, on behalf of the World Data Center, recently issued a new version (version 2) of sunspot number. The characteristics of sunspot cycles are investigated, based on the function description of the new version.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.nssc.ac.cn/handle/122/6118
Appears in Collections:空间科学部_期刊论文

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