تقرير
New Suns in the Cosmos II: Differential rotation in Kepler Sun-like stars
| العنوان: | New Suns in the Cosmos II: Differential rotation in Kepler Sun-like stars |
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| المؤلفون: | 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., de Freitas, D. B., Martins, B. L. Canto, Lanza, A. F., De Medeiros, J. R. |
| سنة النشر: | 2016 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Solar and Stellar Astrophysics |
| الوصف: | The present study reports the discovery of Sun-like stars, namely main-sequence stars with $T_{\rm eff}$, $\log g$ and rotation periods $P_{rot}$ similar to solar values, presenting evidence of surface differential rotation. 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 differential rotation; 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 differential rotation. Comment: 9 pages, 5 figures, Accepted for publication on MNRAS |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1093/mnras/stw2026 |
| URL الوصول: | http://arxiv.org/abs/1608.01549 |
| رقم الأكسشن: | edsarx.1608.01549 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1093/mnras/stw2026 |
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