论文标题
旋转时期的太阳发电机周期变化
Solar dynamo cycle variations with a rotational period
论文作者
论文摘要
使用非线性平均场元素模型，我们计算磁性循环参数，例如迪纳摩循环周期，总磁能的幅度以及从表面上的Poynting通量光度，用于太阳能类似物，其旋转周期为1至30天。我们为运动学和非激发功能模型进行仿真。运动发电机模型考虑到非线性$α$效应以及由于磁性浮力而引起的磁通量的损失，显示出随着恒星旋转周期的减少而减少了磁性周期。旋转周期少于10天的恒星显示了磁性活性的非平稳性长期变化。非旋转发电机模型考虑了对流区域内大规模流和热传输的磁场反馈。它们以旋转速率显示了发电机周期的非单调变化。旋转周期的模型少于10天显示了非平稳进化，而旋转速率的增加，初级发电机周期略有增加。非旋转模型显示了随着旋转速率的增加而发电机产生的磁通量的生长。恒星的旋转时间为两天且更少。磁性活性参数的饱和伴随着差异旋转的抑郁。
Using the non-linear mean-field dynamo models we calculate the magnetic cycle parameters, like the dynamo cycle period, the amplitude of the total magnetic energy, and the Poynting flux luminosity from the surface for the solar analogs with rotation periods of range from 1 to 30 days. We do simulations both for the kinematic and non-kinematic dynamo models. The kinematic dynamo models, which take into account the non-linear $α$-effect and the loss of the magnetic flux due to magnetic buoyancy, show a decrease of the magnetic cycle with the decrease of the stellar rotation period. The stars with a rotational period of less than 10 days show the non-stationary long-term variations of the magnetic activity. The non-kinematic dynamo models take into account the magnetic field feedback on the large-scale flow and heat transport inside the convection zone. They show the non-monotonic variation of the dynamo period with the rotation rate. The models for the rotational periods fewer than 10 days show the non-stationary evolution with a slight increase in the primary dynamo period with the increase of the rotation rate. The non-kinematic models show the growth of the dynamo generated magnetic flux with the increase of the rotation rate. There is a dynamo saturation for the star rotating with a period of two days and less. The saturation of the magnetic activity parameters is accompanied by depression of the differential rotation.
