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Constraining differential rotation of Sun-like stars from asteroseismic and starspot rotation periods

机译：限制太阳星在旋转和星点旋转期间的自转差

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In previous work, we identified six Sun-like stars observed by Kepler with exceptionally clear asteroseismic signatures of rotation. Here, we show that five of these stars exhibit surface variability suitable for measuring rotation. We compare the rotation periods obtained from light-curve variability with those from asteroseismology in order to further constrain differential rotation. The two rotation measurement methods are found to agree within uncertainties, suggesting that radial differential rotation is weak, as is the case for the Sun. Furthermore, we find significant discrepancies between ages from asteroseismology and from three different gyrochronology relations, implying that stellar age estimation is problematic even for Sun-like stars.
机译：在先前的工作中，我们确定了开普勒观测到的六颗类似太阳的恒星，它们的旋光异常清晰。在这里，我们表明这些恒星中有五颗具有适用于测量自转的表面变化性。为了进一步限制差分旋转，我们比较了从光曲线可变性和从星震学获得的旋转周期。发现这两种旋转测量方法在不确定性内是一致的，这表明径向差旋转是弱的，就像太阳一样。此外，我们从星震学和三种不同的年代学关系中发现了年龄之间的显着差异，这意味着恒星年龄估计即使对于像太阳一样的恒星也是有问题的。

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