论文标题
通过辐射内部的发电机作用将太阳速粒固定
Confinement of the Solar Tachocline by Dynamo Action in the Radiative Interior
论文作者
论文摘要
太阳能物理学中的一个主要出色问题是限制太阳能速率，这是薄的剪切层，该剪切层将辐射内部的几乎固体旋转与对流区域的强差旋转分开。在这里，我们介绍了第一个3-D全球太阳模拟，其中速粒限制了自激发的发电机。非轴对称磁性最初是在对流区域内建立的，然后扩散地向下烙印。此外，该场是通过赤道rossby波和可能的剪切不稳定性引起的剧烈水平运动在整个辐射内部局部扩增的。因此，我们的工作挑战了长期以来的概念，即太阳的发电机磁场仅与速苯二线一样深，并存储在静止的辐射内部中。
A major outstanding problem in solar physics is the confinement of the solar tachocline, the thin shear layer that separates nearly solid-body rotation in the radiative interior from strong differential rotation in the convection zone. Here, we present the first 3-D, global solar simulation in which a tachocline is confined by a self-excited dynamo. The non-axisymmetric magnetism is initially built in the convection zone and then diffusively imprints downward. Additionally, the field is locally amplified throughout the radiative interior by vigorous horizontal motions that arise from equatorial Rossby waves and possibly shear instabilities. Our work thus challenges the long-held notion that the Sun's dynamo magnetic field is amplified only as deep as the tachocline and stored in a quiescent radiative interior.
