New Suns in the Cosmos II: differential rotation in Kepler Sun-like stars
The present study reports the discovery of Sun-like stars, namely main-sequence stars with Teff, log g and rotation periods Prot similar to solar values, presenting evidence of surface differential rotation (DR). An autocorrelation of the time series was used to select stars presenting photometric s...
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ri-123456789-290882020-05-31T07:53:22Z New Suns in the Cosmos II: differential rotation in Kepler Sun-like stars Chagas, M. L. das Bravo, J. P. Costa, A. D. Lopes, C. E. Ferreira Sobrinho, R. Silva Paz-Chinchón, F. Leão, I. C. Valio, A. Freitas, D. B. de Martins, B. L. Canto Lanza, A. F. Medeiros, José Renan de Stars: rotation Stars: solar Type Starspots The present study reports the discovery of Sun-like stars, namely main-sequence stars with Teff, log g and rotation periods Prot similar to solar values, presenting evidence of surface differential rotation (DR). An autocorrelation of the time series was used to select stars presenting photometric signal stability from a sample of 881 stars with light curves collected by the Kepler space-borne telescope, in which we have identified 17 stars with stable signals. A simple two-spot model together with a Bayesian information criterion were applied to these stars in the search for indications of DR; in addition, for all 17 stars, it was possible to compute the spot rotation period P, the mean values of the individual spot rotation periods and their respective colatitudes, and the relative amplitude of the DR. 2020-05-28T13:20:52Z 2020-05-28T13:20:52Z 2016 article MEDEIROS, Jose Renan de et al. New Suns in the Cosmos II: Differential rotation in Sun-like stars. Monthly Notices of the Royal Astronomical Society (Print), [s. l.], v. 1143, p. stw2026, 2016. ISSN 1365-2966 versão online. DOIhttps://doi.org/10.1093/mnras/stw2026. Disponível em: https://academic.oup.com/mnras/article/463/2/1624/2892345. Acesso em: 28 maio 2020. 0035-8711 (print), 1365-2966 (online) https://repositorio.ufrn.br/jspui/handle/123456789/29088 https://doi.org/10.1093/mnras/stw2026 en application/pdf Royal Astronomical Society |
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| language |
English |
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Stars: rotation Stars: solar Type Starspots |
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Stars: rotation Stars: solar Type Starspots Chagas, M. L. das Bravo, J. P. Costa, A. D. Lopes, C. E. Ferreira Sobrinho, R. Silva Paz-Chinchón, F. Leão, I. C. Valio, A. Freitas, D. B. de Martins, B. L. Canto Lanza, A. F. Medeiros, José Renan de New Suns in the Cosmos II: differential rotation in Kepler Sun-like stars |
| description |
The present study reports the discovery of Sun-like stars, namely main-sequence stars with Teff, log g and rotation periods Prot similar to solar values, presenting evidence of surface differential rotation (DR). An autocorrelation of the time series was used to select stars presenting photometric signal stability from a sample of 881 stars with light curves collected by the Kepler space-borne telescope, in which we have identified 17 stars with stable signals. A simple two-spot model together with a Bayesian information criterion were applied to these stars in the search for indications of DR; in addition, for all 17 stars, it was possible to compute the spot rotation period P, the mean values of the individual spot rotation periods and their respective colatitudes, and the relative amplitude of the DR. |
| format |
article |
| author |
Chagas, M. L. das Bravo, J. P. Costa, A. D. Lopes, C. E. Ferreira Sobrinho, R. Silva Paz-Chinchón, F. Leão, I. C. Valio, A. Freitas, D. B. de Martins, B. L. Canto Lanza, A. F. Medeiros, José Renan de |
| author_facet |
Chagas, M. L. das Bravo, J. P. Costa, A. D. Lopes, C. E. Ferreira Sobrinho, R. Silva Paz-Chinchón, F. Leão, I. C. Valio, A. Freitas, D. B. de Martins, B. L. Canto Lanza, A. F. Medeiros, José Renan de |
| author_sort |
Chagas, M. L. das |
| title |
New Suns in the Cosmos II: differential rotation in Kepler Sun-like stars |
| title_short |
New Suns in the Cosmos II: differential rotation in Kepler Sun-like stars |
| title_full |
New Suns in the Cosmos II: differential rotation in Kepler Sun-like stars |
| title_fullStr |
New Suns in the Cosmos II: differential rotation in Kepler Sun-like stars |
| title_full_unstemmed |
New Suns in the Cosmos II: differential rotation in Kepler Sun-like stars |
| title_sort |
new suns in the cosmos ii: differential rotation in kepler sun-like stars |
| publisher |
Royal Astronomical Society |
| publishDate |
2020 |
| url |
https://repositorio.ufrn.br/jspui/handle/123456789/29088 https://doi.org/10.1093/mnras/stw2026 |
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