论文标题
GW190521的人口III起源
The Population III origin of GW190521
论文作者
论文摘要
我们探讨了最近检测到的黑洞二进制（BHB）合并事件GW190521源自第一代，无金属，无金属，所谓的人口III（POP III），恒星。基于从POP III星团的N体模拟得出的改进的二进制统计数据，我们计算了两个进化通道中的POP III BHB的合并速率密度与GW190521相似：经典的二进制二进制恒星进化和高降速核星形的动态硬化。两个通道都可以解释观察到的速率密度。但是，与观察结果更好的一致性和对不确定参数的限制更少，后者受到了青睐。我们的分析还表明，鉴于两个渠道的独特特征（合并率分别达到$ z \ lysSim2 $和$ z \ sim 10 $），对BHB合并的未来观察与GW190521相似，与GW190521相似，第三代重力波检测器将极大地提高流行III BHB的进化的知识，特别是在它们的结构中，尤其是在COSM中的发展。
We explore the possibility that the recently detected black hole binary (BHB) merger event GW190521 originates from the first generation of massive, metal-free, so-called Population III (Pop III), stars. Based on improved binary statistics derived from N-body simulations of Pop III star clusters, we calculate the merger rate densities of Pop III BHBs similar to GW190521, in two evolution channels: classical binary stellar evolution and dynamical hardening in high-redshift nuclear star clusters. Both channels can explain the observed rate density. But the latter is favoured by better agreement with observation and less restrictions on uncertain parameters. Our analysis also indicates that given the distinct features of the two channels (with merger rates peaked at $z\lesssim2$ and $z\sim 10$, respectively), future observation of BHB mergers similar to GW190521 with third-generation gravitational wave detectors will greatly improve our knowledge of the evolution of Pop III BHBs, especially for their dynamics during cosmic structure formation.
