New Suns in the Cosmos II: Differential rotation in Kepler Sun-like stars
Tipo
Artigo
Data de publicação
2016
Periódico
Monthly Notices of the Royal Astronomical Society
Citações (Scopus)
12
Autores
Das Chagas M.L.
Bravo J.P.
Costa A.D.
Ferreira Lopes C.E.
Silva Sobrinho R.
Paz-Chinchon F.
Leao I.C.
Valio A.
de Freitas D.B.
Canto Martins B.L.
Lanza A.F.
de Medeiros J.R.
Bravo J.P.
Costa A.D.
Ferreira Lopes C.E.
Silva Sobrinho R.
Paz-Chinchon F.
Leao I.C.
Valio A.
de Freitas D.B.
Canto Martins B.L.
Lanza A.F.
de Medeiros J.R.
Orientador
Título da Revista
ISSN da Revista
Título de Volume
Membros da banca
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Resumo
© 2017 The Authors.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.
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Assuntos Scopus
Auto correlation , Differential rotation , Main sequence stars , Photometrics , Rotation period , Stars: Rotation , Stars: solar types , Starspots , Surface differentials , Times series