Nearly uniform internal rotation of solar-like main-sequence stars revealed by space-based asteroseismology and spectroscopic measurements
Nearly uniform internal rotation of solar-like main-sequence stars revealed by space-based asteroseismology and spectroscopic measurements
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DOI：
10.1093/mnras/stv1493
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发表时间：
2015-07
影响因子：
4.8
通讯作者：
O. Benomar;M. Takata;H. Shibahashi;Tugdual Ceillier;R. García
中科院分区：
文献类型：
--
作者：
O. Benomar;M. Takata;H. Shibahashi;Tugdual Ceillier;R. García
结合星震学分析和光谱测量，对22颗质量在1.0 ~ 1.6 μ m之间的主序星的内部和表面自转速率进行了约束。每颗星星的星震数据由开普勒或CoRoT空间使命获取。结果表明，大多数恒星的表面自转速率与平均自转速率（不包括对流核）之间的差异很小，表明在恒星的主序星阶段之前和/或期间，存在一个有效的角动量输运过程。如果假设每颗恒星的表面对流区和下面的辐射区都是均匀旋转的，那么在大多数恒星中，这两个区域之间的旋转速率之差不超过2倍，与它们的年龄无关。
The rotation rates in the deep interior and at the surface of 22 main-sequence stars with masses between $1.0$ and $1.6\,{\rm M}_{\odot}$ are constrained by combining asteroseismological analysis with spectroscopic measurements. The asteroseismic data of each star are taken by the {\it Kepler} or CoRoT space mission. It is found that the difference between the surface rotation rate and the average rotation rate (excluding the convective core) of most of stars is small enough to suggest that an efficient process of angular momentum transport operates during and/or before the main-sequence stage of stars. If each of the surface convective zone and the underlying radiative zone, for individual stars, is assumed to rotate uniformly, the difference in the rotation rate between the two zones turns out to be no more than a factor of two in most of the stars independently of their ages.