Stellar oscillations show differential rotation The Sun rotates faster at its equator than at its poles. This process is known as differential rotation and is seen in the motion of sunspots. Helioseismology has shown that the effect extends into the Sun's interior. It has not been possible to measure whether other stars also experience equivalent differential rotation. Benomar et al. used the Kepler spacecraft to monitor stellar oscillations of a group of Sun-like stars. By decomposing the oscillations into separate frequencies, they searched for signs of differential rotation. Several stars do indeed seem to have equators that spin faster than their poles, and none indicated the opposite pattern. Science, this issue p. 1231 Stellar oscillations show that some solar-type stars spin faster at their equators than their poles. The differentially rotating outer layers of stars are thought to play a role in driving their magnetic activity, but the underlying mechanisms that generate and sustain differential rotation are poorly understood. We report the measurement using asteroseismology of latitudinal differential rotation in the convection zones of 40 Sun-like stars. For the most significant detections, the stars’ equators rotate approximately twice as fast as their midlatitudes. The latitudinal shear inferred from asteroseismology is much larger than predictions from numerical simulations.

中文翻译：

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13颗类太阳恒星纬度差自转的星震探测

恒星振荡显示不同的自转太阳在赤道的旋转速度比在两极的速度快。这个过程被称为差速旋转，可以在太阳黑子的运动中看到。日震学表明，这种影响会延伸到太阳的内部。无法测量其他恒星是否也经历了等效的微分自转。贝诺马尔等人。使用开普勒航天器监测一组类太阳恒星的恒星振荡。通过将振荡分解成不同的频率，他们寻找不同旋转的迹象。确实有几颗恒星的赤道似乎确实比它们的两极旋转得更快，而且没有一颗表明相反的模式。科学，这个问题 p。1231 恒星振荡表明，一些类太阳恒星在赤道自转比两极旋转得更快。人们认为恒星的不同旋转外层在驱动它们的磁活动中起作用，但产生和维持不同旋转的潜在机制知之甚少。我们报告了在 40 颗类太阳恒星的对流区中使用纬度差异旋转的星震学进行的测量。对于最重要的探测，恒星的赤道旋转速度大约是它们中纬度的两倍。从星震学推断的纬度切变比数值模拟的预测大得多。我们报告了使用星震学在 40 颗类太阳恒星的对流区中的纬度差动旋转的测量结果。对于最重要的探测，恒星的赤道旋转速度大约是它们中纬度的两倍。从星震学推断的纬度切变比数值模拟的预测大得多。我们报告了使用星震学在 40 颗类太阳恒星的对流区中的纬度差动旋转的测量结果。对于最重要的探测，恒星的赤道旋转速度大约是它们中纬度的两倍。从星震学推断的纬度切变比数值模拟的预测大得多。