论文标题
地平线模拟中的空间偏移黑洞，并与观测值进行比较
Spatially offset black holes in the Horizon-AGN simulation and comparison to observations
论文作者
论文摘要
我们研究了星系中心及其超级质量黑洞（BHS）之间的位移，并在宇宙流体动力学模拟范围内以及文献中的各种观察结果中进行了位移。 Horizon-agn中的BHS感觉到由周围气体采购的亚电网动力学摩擦力，从而防止了后退BHS从星系中弹出。我们发现，我的空间抵消BHS的比例随宇宙时间的增加而增加，ii）BHS生活在银河飞机上的序列轨道上，轨道半径呈轨道半径，但随着时间的流逝，$ z = 0 $，iii）的失速比从星系中心大大的位置在模拟中大大比较大。我们归因于插座的失速和过度的偏移幅度，这是一个事实，即恒星和暗物质的动力摩擦未在模拟中建模，因此提供了一种改善未来模拟的黑洞动力学的方法。
We study the displacements between the centres of galaxies and their supermassive black holes (BHs) in the cosmological hydrodynamical simulation Horizon-AGN, and in a variety of observations from the literature. The BHs in Horizon-AGN feel a sub-grid dynamical friction force, sourced by the surrounding gas, which prevents recoiling BHs being ejected from the galaxy. We find that i) the fraction of spatially offset BHs increases with cosmic time, ii) BHs live on prograde orbits in the plane of the galaxy with an orbital radius that decays with time but stalls near $z=0$, and iii) the magnitudes of offsets from the galaxy centres are substantially larger in the simulation than in observations. We attribute the stalling of the infall and excessive offset magnitudes to the fact that dynamical friction from stars and dark matter is not modelled in the simulation, and hence provide a way to improve the black hole dynamics of future simulations.
