论文标题
宇宙学模拟中超大黑洞的复杂演化
The complex evolution of supermassive black holes in cosmological simulations
论文作者
论文摘要
我们在这里介绍在完整的宇宙学环境中形成的大规模星系的自愿放大模拟。模拟使用Ketju代码的更新版本运行，该版本能够解决其超大质量黑洞的重力动力学，同时对周围星系中的大型天体物理过程进行建模，例如气体冷却，星形造型，星形形成，恒星和恒星和Agn反馈。 Ketju代码能够准确地对多个SMBH的复杂行为进行建模，包括动力学摩擦，恒星散射和重力波发射，也可以解决自然发生在层次三胞胎SMBH系统中的Lidov-Kozai振荡。通常，大多数SMBH二进制文件以中等高的偏心率形成，典型的值在E = 0.6-0.95的范围内，这意味着文献中通常使用的圆形二进制模型不足以捕获典型的二元进化。
We present here self-consistent zoom-in simulations of massive galaxies forming in a full cosmological setting. The simulations are run with an updated version of the KETJU code, which is able to resolve the gravitational dynamics of their supermassive black holes, while simultaneously modelling the large-scale astrophysical processes in the surrounding galaxies, such as gas cooling, star formation and stellar and AGN feedback. The KETJU code is able to accurately model the complex behaviour of multiple SMBHs, including dynamical friction, stellar scattering and gravitational wave emission, and also to resolve Lidov-Kozai oscillations that naturally occur in hierarchical triplet SMBH systems. In general most of the SMBH binaries form at moderately high eccentricities, with typical values in the range of e =0.6-0.95, meaning that the circular binary models that are commonly used in the literature are insufficient for capturing the typical binary evolution.
