论文标题
带有大规模磁场的早期型恒星中旋转和减少质量损失
Spin-down and reduced mass loss in early-type stars with large-scale magnetic fields
论文作者
论文摘要
磁性会极大地影响恒星的演变。在某些具有OBA光谱类型的恒星中，有直接的证据通过Zeeman效应稳定的大型磁层，这导致了恒星表面的旋转并减少了质量损失。到目前为止，还缺乏对这些影响的恒星结构和进化模型的全面网格。因此，我们使用Mesa软件仪器在三个金属性环境中使用两个磁制动和两个化学混合方案进行了计算和研究模型。我们发现子网格之间的显着差异，这会影响模型预测，从而影响恒星的详细表征。我们能够在预防准化学均匀的进化和产生缓慢旋转的氮富集（“第2组”）恒星方面量化磁场的影响。我们的模型网格是完全开放的访问和开源。
Magnetism can greatly impact the evolution of stars. In some stars with OBA spectral types there is direct evidence via the Zeeman effect for stable, large-scale magnetospheres, which lead to the spin-down of the stellar surface and reduced mass loss. So far, a comprehensive grid of stellar structure and evolution models accounting for these effects was lacking. For this reason, we computed and studied models with two magnetic braking and two chemical mixing schemes in three metallicity environments with the MESA software instrument. We find notable differences between the subgrids, which affects the model predictions and thus the detailed characterisation of stars. We are able to quantify the impact of magnetic fields in terms of preventing quasi-chemically homogeneous evolution and producing slowly-rotating, nitrogen-enriched ("Group 2") stars. Our model grid is fully open access and open source.
