论文标题
来自星际盒模拟的循环的太阳能发电机和旋转缩放
Solar-like dynamos and rotational scaling of cycles from star-in-a-box simulations
论文作者
论文摘要
提出了具有不同旋转速率的太阳能恒星中对流和发电机的磁性水力动力学模拟。这些模拟使用快速的赤道和缓慢的极点产生太阳样的差异旋转，以及类似于赤道向赤道迁移活性的磁性活动。此外，随着此处考虑的有限样本中的旋转周期减小，旋转与周期周期的比率几乎是恒定的。这让人联想到恒星与观测值的无活性分支，与球形壳模型的大多数较早模拟结果不同。尽管当前模拟中发电机的确切激发机理尚不清楚，但由于将辐射芯的包含在内，磁场具有更大的自由是合理的，而恒星外部的区域对于塑造发电机很重要。
Magnetohydrodynamic star-in-a-box simulations of convection and dynamos in a solar-like star with different rotation rates are presented. These simulations produce solar-like differential rotation with a fast equator and slow poles, and magnetic activity that resembles that of the Sun with equatorward migrating activity at the surface. Furthermore, the ratio of rotation to cycle period is almost constant as the rotation period decreases in the limited sample considered here. This is reminiscent of the suggested inactive branch of stars from observations and differs from most earlier simulation results from spherical shell models. While the exact excitation mechanism of the dynamos in the current simulations is not yet clear, it is plausible that the greater freedom that the magnetic field has due to the inclusion of the radiative core and regions exterior to the star are important in shaping the dynamo.
