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Multifractal properties of solar filaments and sunspots numbers
Wu, Nan; Li, Qi-Xiu1; Zou, Peng
2015-07-01
Source PublicationNEW ASTRONOMY
Volume38Pages:1-10
AbstractWe 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.
KeywordSun: Sunspots Sun: Filaments Method: Data Analysis
Subject Area天文和天体物理
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.newast.2014.12.008
WOS KeywordCONTINUOUS WAVELET TRANSFORM ; STRANGE ATTRACTORS ; TIME-SERIES ; MAGNETIC-FIELD ; GENERALIZED DIMENSIONS ; ACTIVE REGIONS ; DIFFERENTIAL ROTATION ; FRACTAL DIMENSIONS ; CHAOTIC BEHAVIOR ; ACTIVITY CYCLE
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000351979500001
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/14882
Collection南极天文中心
Affiliation1.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
Recommended Citation
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.
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