Center for Space Science, New York University, Abu Dhabi (NYUAD), UAE.
Max-Planck-Institut für Sonnensystemforschung, 37077 Göttingen, Germany.
Science. 2018 Sep 21;361(6408):1231-1234. doi: 10.1126/science.aao6571.
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.
人们认为恒星的外层具有不同的自转速度，这在驱动恒星的磁场活动中扮演着重要的角色。然而，产生和维持这种不同自转速度的潜在机制仍不清楚。我们利用星震学测量了 40 颗类似太阳的恒星的对流区的纬度差异旋转。在最显著的探测中，这些恒星的赤道自转速度大约是中纬度的两倍。从星震学推断出的纬度剪切比数值模拟的预测值大得多。
