论文标题
内部旋转和缓慢脉动B星的倾斜：内部角动量转运的证据
Internal rotation and inclinations of slowly pulsating B stars: Evidence of interior angular momentum transport
论文作者
论文摘要
恒星结构和进化论中最大的不确定性之一是恒星内部的角动量的运输。 Asterosemology提供了一种强大的工具，用于测量脉动星的内部旋转频率，但是对于$ \ gtrsim 3 \，{\ rm m} _ \ odot $ main-seperence streemence stars而言，此类测量的数量仍然很少。在这项工作中，我们汇编了52个缓慢脉动的B恒星的列表，该恒星为中心旋转测量了内部旋转。旋转参数的测量值描述了旋转的相对重要性，因为重力惯性模式振荡表明，在40个恒星中，振荡落在亚惯用状态内。我们发现，恒星的核心旋转频率随着年龄的函数而降低，并显示了在主序列上发生角动量转运的证据。最后，我们得出恒星的倾斜角度，表明它们通常与给定振荡模式的表面取消效应的期望一致。
One of the largest uncertainties in stellar structure and evolution theory is the transport of angular momentum in the stellar interiors. Asteroseismology offers a powerful tool for measuring the internal rotation frequencies of pulsating stars, but the number of such measurements has remained few for $\gtrsim 3\,{\rm M}_\odot$ main-sequence stars. In this work, we compile a list of 52 slowly pulsating B stars for which the interior rotation has been measured asteroseismically. The measurements of the spin parameters, which describe the relative importance of rotation, for the gravito-inertial mode oscillations show that for 40 of the stars the oscillations fall within the sub-inertial regime. We find that the core rotation frequencies of the stars decrease as a function of age, and show evidence of angular momentum transport occurring on the main-sequence. Finally, we derive the inclination angles of the stars, showing that they are generally consistent with the expectations from surface cancellation effects for the given oscillation modes.
