Overview of semi-sinusoidal stellar variability with the CoRoT satellite

Medeiros, José Renan de; Lopes, C. E. Ferreira; Leão, Izan de Castro; Martins, Bruno Leonardo Canto; Catelan, M.; Baglin, A.; Vieira, S.; Bravo, J. P.; Cortés, C.; Freitas, D. B. de; Janot-Pacheco, E.; Maciel, S. C.; Melo, C. H. F.; Osorio, Y.; Mello, G. F. Porto de; Valio, A.

Overview of semi-sinusoidal stellar variability with the CoRoT satellite

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dc.contributor.author	Medeiros, José Renan de
dc.contributor.author	Lopes, C. E. Ferreira
dc.contributor.author	Leão, Izan de Castro
dc.contributor.author	Martins, Bruno Leonardo Canto
dc.contributor.author	Catelan, M.
dc.contributor.author	Baglin, A.
dc.contributor.author	Vieira, S.
dc.contributor.author	Bravo, J. P.
dc.contributor.author	Cortés, C.
dc.contributor.author	Freitas, D. B. de
dc.contributor.author	Janot-Pacheco, E.
dc.contributor.author	Maciel, S. C.
dc.contributor.author	Melo, C. H. F.
dc.contributor.author	Osorio, Y.
dc.contributor.author	Mello, G. F. Porto de
dc.contributor.author	Valio, A.
dc.date.accessioned	2020-05-19T21:46:08Z
dc.date.available	2020-05-19T21:46:08Z
dc.date.issued	2013
dc.description.resumo	Context. To date, the CoRoT space mission has produced more than 124 471 light curves. Classifying these curves in terms of unambiguous variability behavior is mandatory for obtaining an unbiased statistical view on their controlling root-causes. Aims. The present study provides an overview of semi-sinusoidal light curves observed by the CoRoT exo-field CCDs. Methods. We selected a sample of 4206 light curves presenting well-defined semi-sinusoidal signatures. The variability periods were computed based on Lomb-Scargle periodograms, harmonic fits, and visual inspection. Results. Color–period diagrams for the present sample show the trend of an increase of the variability periods as long as the stars evolve. This evolutionary behavior is also noticed when comparing the period distribution in the Galactic center and anti-center directions. These aspects indicate a compatibility with stellar rotation, although more information is needed to confirm their rootcauses. Considering this possibility, we identified a subset of three Sun-like candidates by their photometric period. Finally, the variability period versus color diagram behavior was found to be highly dependent on the reddening correction.	pt_BR
dc.identifier.citation	MEDEIROS, José Renan de et al. Overview of semi-sinusoidal stellar variability with the CoRoT satellite. Astronomy & Astrophysics (Berlin. Print), v. 555, p. A63, 2013. ISSN 1432-0746 versão online. DOI https://doi.org/10.1051/0004-6361/201219415. Disponível em: https://www.aanda.org/articles/aa/abs/2013/07/aa19415-12/aa19415-12.html. Acesso em: 19 Maio 2020. Reproduzido com a permissão de Astronomy & Astrophysics, © ESO. Reproduzido com permissão da Astronomy & Astrophysics, © ESO.	pt_BR
dc.identifier.doi	https://doi.org/10.1051/0004-6361/201219415
dc.identifier.issn	0004-6361 (print), 1432-0746 (online)
dc.identifier.uri	https://repositorio.ufrn.br/jspui/handle/123456789/29020
dc.language	en	pt_BR
dc.publisher	Astronomy & Astrophysics	pt_BR
dc.subject	Stars: variables: general	pt_BR
dc.subject	Stars: rotation	pt_BR
dc.subject	Techniques: photometric	pt_BR
dc.title	Overview of semi-sinusoidal stellar variability with the CoRoT satellite	pt_BR
dc.type	article	pt_BR