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The Suppression and Promotion of Magnetic Flux Emergence in Fully Convective Stars

机译:抑制和促进磁通量在完全对流恒星中的出现

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Evidence of surface magnetism is now observed on an increasing number of cool stars. The detailed manner by which dynamo-generated magnetic fields giving rise to starspots traverse the convection zone still remains unclear. Some insight into this flux emergence mechanism has been gained by assuming bundles of magnetic field can be represented by idealized thin flux tubes (TFTs). Weber & Browning (2016) have recently investigated how individual flux tubes might evolve in a 0.3M_⊙ M dwarf by effectively embedding TFTs in time-dependent flows representative of a fully convective star. We expand upon this work by initiating flux tubes at various depths in the upper ~50-75% of the star in order to sample the differing convective flow pattern and differential rotation across this region. Specifically, we comment on the role of differential rotation and time-varying flows in both the suppression and promotion of the magnetic flux emergence process.
机译:现在在越来越多的凉爽恒星上观察到表面磁性的证据。发电机产生的磁场引起星空的详细方式遍历对流区域仍然不清楚。通过假设磁场束可以通过理想化的薄助焊剂管(TFT)来获得对该焊剂出现机理的一些洞察。 Weber&Browning(2016)最近研究了单个助焊剂管如何在0.3m×m矮子中,通过有效地嵌入代表完全对流星的时间依赖性流动的TFT。我们通过在恒星上〜50-75%的各种深度处启动助焊剂管来扩展这项工作,以便在该区域上采样不同的对流流动模式和差动旋转。具体而言,我们评论差分旋转和时变流在磁通出现过程的抑制和促进中的作用。

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