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New Suns in the Cosmos II: differential rotation in Kepler Sun-like stars

Journal
Date Issued
2016
Author(s)
Das Chagas, M. L.
•
Bravo, J. P.
•
Costa, A. D.
•
Ferreira Lopes, C. E.
•
Silva Sobrinho, R.
•
Paz-Chinchón, F.
•
Leão, I. C.
•
Valio, A.
•
de Freitas, D. B.
•
Canto Martins, B. L.
•
•
De Medeiros, J. R.
DOI
Abstract
The present study reports the discovery of Sun-like stars, namely main-sequence stars with T_eff, log g and rotation periods P_rot 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.
Volume
463
Issue
2
Start page
1624
Uri
Url
Issn Identifier
0035-8711
Ads BibCode
2016MNRAS.463.1624D
Rights
open.access
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