论文标题
旋转光盘中的动力摩擦驱动轨道圆形化：半分析描述
Dynamical friction-driven orbital circularisation in rotating discs: a semi-analytical description
论文作者
论文摘要
我们提出并验证一种新型的半分析方法，以研究动态摩擦对旋转恒星盘中巨大遗传者轨道的影响。我们发现，动态摩擦有效地循环了共旋转遗物的轨道，而它不断增加反向旋转的偏心率，直到其角动量反向，然后再次促进圆形化。这种“向圆形旋转”可以塑造圆盘星系中运动学脱钩的方向的分布，自然会导致观察到的共旋转核心的较大部分。
We present and validate a novel semi-analytical approach to study the effect of dynamical friction on the orbits of massive perturbers in rotating stellar discs. We find that dynamical friction efficiently circularises the orbit of co-rotating perturbers, while it constantly increases the eccentricity of counter-rotating ones until their angular momenta reverse, then once again promoting circularisation. Such "drag toward circular corotation" could shape the distribution of orientations of kinematically decoupled cores in disc galaxies, naturally leading to the observed larger fraction of co-rotating cores.
