New suns in the cosmos. iii. multifractal signature analysis
| dc.contributor.author | Freitas, D. B. de | |
| dc.contributor.author | Nepomuceno, M. M. F. | |
| dc.contributor.author | Moraes Junior, P. R. V. de | |
| dc.contributor.author | Lopes, C. E. F. | |
| dc.contributor.author | Chagas, M. L. das | |
| dc.contributor.author | Bravo, J. P. | |
| dc.contributor.author | Costa, A. D. | |
| dc.contributor.author | Martins, B. L. Canto | |
| dc.contributor.author | Medeiros, José Renan de | |
| dc.contributor.author | Leão, I. C. | |
| dc.date.accessioned | 2020-05-28T13:08:42Z | |
| dc.date.available | 2020-05-28T13:08:42Z | |
| dc.date.issued | 2016 | |
| dc.description.resumo | 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. | pt_BR |
| dc.identifier.citation | 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. | pt_BR |
| dc.identifier.doi | http://dx.doi.org/10.3847/0004-637X/831/1/87 | |
| dc.identifier.issn | 0004-637X (print), 1538-4357 (online) | |
| dc.identifier.uri | https://repositorio.ufrn.br/jspui/handle/123456789/29087 | |
| dc.language | en | pt_BR |
| dc.publisher | American Astronomical Society | pt_BR |
| dc.subject | Methods: data analysis | pt_BR |
| dc.subject | Stars: rotation | pt_BR |
| dc.subject | Stars: solar-type | pt_BR |
| dc.subject | Sun: rotation | pt_BR |
| dc.title | New suns in the cosmos. iii. multifractal signature analysis | pt_BR |
| dc.type | article | pt_BR |
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