论文标题
合并黑洞的潜在亚群和组装趋势
Potential Subpopulations and Assembling Tendency of the Merging Black Holes
论文作者
论文摘要
高级Ligo/处女座检测到的合并二进制黑洞（BBH）的起源仍在争论中，并且可能存在这些合并事件的联合质量旋转分布中的线索。在这里，我们构建了包含两个亚种群的现象学模型，以研究重力波观测中检测到的BBH种群。我们发现我们的模型可以很好地解释GWTC-3数据，并且数据需要对我们的模型的几个约束：首先，具有恒星 - 原始的组件的最大质量，$ m _ {\ rm max} $，是$ 39.1^{+2.4} {+2.4} _ { - 2.7} _ { - 2.7} m _ { - 2.7} m_ _ _}其次，大约15美元的合并发生在动态环境中，其中$ 7-16 \％$的事件是层次合并，并且这些BHS的平均旋转幅度明显大于第一代合并，$ {\ rm d}μ__ {\ rm d}μ_{\ rm a}> 0.4 $ 0.4 $ 0.4 $ 0.4 $ 0.4 $ $ 99 $ \％；第三，动态成分BHS倾向于彼此配对，总质量和较高的质量比。还进行了针对旋转的独立分析，我们发现，根据分区质量$ m _ {\ rm d} = 46.1^{+5.6} _ { - 5.1} _ { - 5.1} m _ {\ odot} $。这些约束可以通过当前的形成渠道自然解释，我们的结果表明，某些观察到的事件可能来自AGN磁盘。
The origins of coalescing binary black holes (BBHs) detected by the advanced LIGO/Virgo are still under debate, and clues may be present in the joint mass-spin distribution of these merger events. Here we construct phenomenological models containing two sub-populations to investigate the BBH population detected in gravitational wave observations. We find that our models can explain the GWTC-3 data rather well, and several constraints to our model are required by the data: first, the maximum mass for the component with a stellar-origin, $m_{\rm max}$, is $39.1^{+2.4}_{-2.7}M_{\odot}$ at 90\% credibility; second, about $15\%$ of the mergers happen in dynamical environments, in which $7-16\%$ of events are hierarchical mergers, and these BHs have an average spin magnitude significantly larger than the first-generation mergers, with ${\rm d}μ_{\rm a} > 0.4 $ at $99\%$ credibility; third, the dynamical component BHs tend to pair with each other with larger total mass and higher mass ratio. An independent analysis focusing on spins is also carried out, and we find that the spin amplitude of component BHs can be divided into two groups according to a division mass $m_{\rm d} = 46.1^{+5.6}_{-5.1}M_{\odot}$. These constraints can be naturally explained by current formation channels, and our results suggest that some of the observed events were likely from AGN disks.
