New suns in the cosmos. iii. multifractal signature analysis

In the present paper, we investigate the multifractality signatures in hourly time series extracted from the CoRoTspacecraft database. Our analysis is intended to highlight the possibility that astrophysical time series can be members of a particular class of complex and dynamic processes, which req...

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Principais autores: Freitas, D. B. de, Nepomuceno, M. M. F., Moraes Junior, P. R. V. de, Lopes, C. E. F., Chagas, M. L. das, Bravo, J. P., Costa, A. D., Martins, B. L. Canto, Medeiros, José Renan de, Leão, I. C.
Formato: article
Idioma:English
Publicado em: American Astronomical Society
Assuntos:
Methods: data analysis
Stars: rotation
Stars: solar-type
Sun: rotation
Endereço do item:https://repositorio.ufrn.br/jspui/handle/123456789/29087
http://dx.doi.org/10.3847/0004-637X/831/1/87
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spelling ri-123456789-290872022-10-20T20:57:13Z New suns in the cosmos. iii. multifractal signature analysis Freitas, D. B. de Nepomuceno, M. M. F. Moraes Junior, P. R. V. de Lopes, C. E. F. Chagas, M. L. das Bravo, J. P. Costa, A. D. Martins, B. L. Canto Medeiros, José Renan de Leão, I. C. Methods: data analysis Stars: rotation Stars: solar-type Sun: rotation In the present paper, we investigate the multifractality signatures in hourly time series extracted from the CoRoTspacecraft database. Our analysis is intended to highlight the possibility that astrophysical time series can be members of a particular class of complex and dynamic processes, which require several photometric variability diagnostics to characterize their structural and topological properties. To achieve this goal, we search for contributions due to a nonlinear temporal correlation and effects caused by heavier tails than the Gaussian distribution, using a detrending moving average algorithm for one-dimensional multifractal signals (MFDMA). We observe that the correlation structure is the main source of multifractality, while heavy-tailed distribution plays a minor role in generating the multifractal effects. Our work also reveals that the rotation period of stars is inherently scaled by the degree of multifractality. As a result, analyzing the multifractal degree of the referred series, we uncover an evolution of multifractality from shorter to larger periods. 2020-05-28T13:08:42Z 2020-05-28T13:08:42Z 2016 article MEDEIROS, José Renan de et al. New suns in the cosmos. iii. multifractal signature analysis. Astrophysical Journal (Online), [s. l.], v. 831, p. 87, 2016. ISSN 1538-4357 versão online. DOI https://doi.org/10.3847/0004-637X/831/1/87. Disponível em: http://iopscience.iop.org/article/10.3847/0004-637X/831/1/87/meta. Acesso em: 28/05/2020. 0004-637X (print), 1538-4357 (online) https://repositorio.ufrn.br/jspui/handle/123456789/29087 http://dx.doi.org/10.3847/0004-637X/831/1/87 en American Astronomical Society
institution Repositório Institucional
collection RI - UFRN
language English
topic Methods: data analysis
Stars: rotation
Stars: solar-type
Sun: rotation
spellingShingle Methods: data analysis
Stars: rotation
Stars: solar-type
Sun: rotation
Freitas, D. B. de
Nepomuceno, M. M. F.
Moraes Junior, P. R. V. de
Lopes, C. E. F.
Chagas, M. L. das
Bravo, J. P.
Costa, A. D.
Martins, B. L. Canto
Medeiros, José Renan de
Leão, I. C.
New suns in the cosmos. iii. multifractal signature analysis
description In the present paper, we investigate the multifractality signatures in hourly time series extracted from the CoRoTspacecraft database. Our analysis is intended to highlight the possibility that astrophysical time series can be members of a particular class of complex and dynamic processes, which require several photometric variability diagnostics to characterize their structural and topological properties. To achieve this goal, we search for contributions due to a nonlinear temporal correlation and effects caused by heavier tails than the Gaussian distribution, using a detrending moving average algorithm for one-dimensional multifractal signals (MFDMA). We observe that the correlation structure is the main source of multifractality, while heavy-tailed distribution plays a minor role in generating the multifractal effects. Our work also reveals that the rotation period of stars is inherently scaled by the degree of multifractality. As a result, analyzing the multifractal degree of the referred series, we uncover an evolution of multifractality from shorter to larger periods.
format article
author Freitas, D. B. de
Nepomuceno, M. M. F.
Moraes Junior, P. R. V. de
Lopes, C. E. F.
Chagas, M. L. das
Bravo, J. P.
Costa, A. D.
Martins, B. L. Canto
Medeiros, José Renan de
Leão, I. C.
author_facet Freitas, D. B. de
Nepomuceno, M. M. F.
Moraes Junior, P. R. V. de
Lopes, C. E. F.
Chagas, M. L. das
Bravo, J. P.
Costa, A. D.
Martins, B. L. Canto
Medeiros, José Renan de
Leão, I. C.
author_sort Freitas, D. B. de
title New suns in the cosmos. iii. multifractal signature analysis
title_short New suns in the cosmos. iii. multifractal signature analysis
title_full New suns in the cosmos. iii. multifractal signature analysis
title_fullStr New suns in the cosmos. iii. multifractal signature analysis
title_full_unstemmed New suns in the cosmos. iii. multifractal signature analysis
title_sort new suns in the cosmos. iii. multifractal signature analysis
publisher American Astronomical Society
publishDate 2020
url https://repositorio.ufrn.br/jspui/handle/123456789/29087
http://dx.doi.org/10.3847/0004-637X/831/1/87
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