Multifractal properties of solar filaments and sunspots numbers | |
Wu, Nan; Li, Qi-Xiu1; Zou, Peng | |
刊名 | NEW ASTRONOMY |
2015-07-01 | |
卷号 | 38页码:1-10 |
关键词 | Sun: sunspots Sun: filaments Method: data analysis |
英文摘要 | We analyze multifractal properties of low (LLSFNs; < 50 degrees), high (HISFNs; >= 50 degrees), full-disk (FDSFNs; 0 degrees similar to 90 degrees) solar filament numbers (SFNs) and international sunspot numbers (ISNs) by estimating characteristic parameters (alpha(0), Delta(alpha), spectrum skewness) off (alpha) singularity spectrum. We find that the SFNs and ISNs have multifractal nature. The obtained alpha(0) and Delta(alpha) indicate that long-term behaviour of the solar filaments is more complex than that of the sunspots and the high-latitude filaments is the most complex in long-term behaviour. The spectrum skewnesses manifest that the ISNs display well symmetrical distribution in singularity strengths, whereas the SFNs are dominated by low singularity strengths, which means that the long-term behaviour of sunspots has homogenous structures and the filaments display averagely small fluctuations in amplitude. To detect the origin of their multifractality, we decompose the raw data of ISNs and SFNs: smoothed data represent similar to 11-year cyclic activities and detrended data represent accidental activities. We also calculate their f(alpha) spectra, respectively. We find that the similar to 11-year cyclic activities of filaments and sunspots tend to be a monofractal and display a bit predominance of low singularity strengths. Their accidental activities have the most complex behaviour than the raw and smoothed data. The accidental activities are dominated by high singularity strengths showing averagely large fluctuations in amplitude. Furthermore, multifractal properties from alpha(0) and Delta(alpha) of the accidental activities have the same features as that of raw data. We think that the similar to 11-year periodic activity determines global fluctuations, while the accidental activities rule local complexity. (C) 2014 Elsevier B.V. All rights reserved. |
学科主题 | 天文和天体物理 |
WOS标题词 | Science & Technology ; Physical Sciences |
类目[WOS] | Astronomy & Astrophysics |
研究领域[WOS] | Astronomy & Astrophysics |
关键词[WOS] | CONTINUOUS WAVELET TRANSFORM ; STRANGE ATTRACTORS ; TIME-SERIES ; MAGNETIC-FIELD ; GENERALIZED DIMENSIONS ; ACTIVE REGIONS ; DIFFERENTIAL ROTATION ; FRACTAL DIMENSIONS ; CHAOTIC BEHAVIOR ; ACTIVITY CYCLE |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000351979500001 |
内容类型 | 期刊论文 |
源URL | [http://libir.pmo.ac.cn/handle/332002/14882] |
专题 | 紫金山天文台_南极天文中心 |
作者单位 | 1.Chongqing Univ, Dept Phys, Chongqing 400044, Peoples R China 2.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Wu, Nan,Li, Qi-Xiu,Zou, Peng. Multifractal properties of solar filaments and sunspots numbers[J]. NEW ASTRONOMY,2015,38:1-10. |
APA | Wu, Nan,Li, Qi-Xiu,&Zou, Peng.(2015).Multifractal properties of solar filaments and sunspots numbers.NEW ASTRONOMY,38,1-10. |
MLA | Wu, Nan,et al."Multifractal properties of solar filaments and sunspots numbers".NEW ASTRONOMY 38(2015):1-10. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论