论文标题
N体模拟中的径向迁移和垂直作用
Radial migration and vertical action in N-body simulations
论文作者
论文摘要
我们研究恒星的径向迁移是轨道作用的函数，以及一大堆分离的椎间盘星系的N体模拟的结构特性。我们的目标是建立恒星的径向迁移效率与其垂直作用之间的关系。我们的目的是描述这种关系如何取决于光盘与暗物质光环之间的相对引力支配地位。通过更改光盘和暗物质光环的质量比，我们发现圆盘优势，螺旋臂的数量和强度与随后的径向迁移是垂直作用的函数之间的关系。我们得出的结论是，在大垂直行动下迁移的重要性取决于螺旋臂的强度，因此取决于椎间盘的主导地位。径向动作更加径向的人群经历了较少的径向迁移，而与光盘优势无关。我们的结果对于星系中径向迁移的分析建模的未来很重要，并进一步了解了径向迁移的理解，这是包括银河系在内的星系重组的关键组成部分。
We study the radial migration of stars as a function of orbital action as well as the structural properties of a large suite of N-body simulations of isolated disc galaxies. Our goal is to establish a relationship between the radial migration efficiency of stars and their vertical action. We aim to describe how that relationship depends on the relative gravitational dominance between the disc and the dark matter halo. By changing the mass ratio of our disc and dark matter halo we find a relationship between disc dominance, number and strength of spiral arms, and the ensuing radial migration as a function of the vertical action. We conclude that the importance of migration at large vertical action depends on the strength of the spiral arms and therefore the dominance of the disc. Populations with more radial action undergo less radial migration, independently of disc dominance. Our results are important for the future of analytical modelling of radial migration in galaxies and furthers the understanding of radial migration which is a key component of the restructuring of galaxies, including the Milky Way.
