论文标题
重力后坐力在大型黑洞种子组装中的作用
The role of gravitational recoil in the assembly of massive black hole seeds
论文作者
论文摘要
当两个黑洞合并时，重力波的不对称发射为合并系统提供了冲动。这种引力波后退速度可高达4000 km s $^{ - 1} $，很容易快速，以使黑洞可以逃脱其宿主星系。我们将半分析建模与银河系型银河系的宇宙缩放模拟相结合，以研究黑洞自旋和重力后坐力在大型黑洞播种时期的作用。我们采样了四个不同的自旋分布（随机，对齐，反将和零自旋），并比较所得的合并率，职业分数和MBH-host关系与排除后坐力的效果所期望的合并率，MBH-host关系。在MBH种子组装中包含重力后坐力和MBH自旋可以将最终的$ Z = 5 $ MBH质量减少到数量级。然而，由于后坐力事件后黑洞形成的发作，MBH职业部分仍然有效地没有改变。尽管不太可能对这些事件进行电磁检测，但丽莎非常适合从此类事件中检测引力波信号。
When two black holes merge, the asymmetric emission of gravitational waves provides an impulse to the merged system; this gravitational wave recoil velocity can be up to 4000 km s$^{-1}$, easily fast enough for the black hole to escape its host galaxy. We combine semi-analytic modeling with cosmological zoom-in simulations of a Milky Way-type galaxy to investigate the role of black hole spin and gravitational recoil in the epoch of massive black hole seeding. We sample four different spin distributions (random, aligned, anti-aligned, and zero spin), and compare the resulting merger rates, occupation fractions, and MBH-host relations with what is expected by excluding the effect of recoil. The inclusion of gravitational recoil and MBH spin in the assembly of MBH seeds can reduce the final $z=5$ MBH mass by up to an order of magnitude. The MBH occupation fraction, however, remains effectively unaltered due to episodes of black hole formation following a recoil event. While electromagnetic detections of these events are unlikely, LISA is ideally suited to detect gravitational wave signals from such events.
