论文标题
活性银核中恒星质量黑洞合并速率的宇宙演化
Cosmic Evolution of Stellar-mass Black Hole Merger Rate in Active Galactic Nuclei
论文作者
论文摘要
二进制黑洞合并编码有关其环境的信息以及导致其形成的天体物理过程。测量其合并率的红移依赖性将有助于探测星系的形成和演化以及恒星形成速率的演变。在这里，我们计算活性银核（AGN）磁盘中恒星质量二进制的合并速率的宇宙演化。我们将重点放在红移$ z = 2 $上，涵盖了当前基于地球的重力波观测站的范围。在此规模上，AGN种群密度是依赖红移的主要因素。我们发现，AGN辅助的合并速率并不能随着红移而有意义地发展，将此通道与场二进制和其他一些动态形成场景区分开来。
Binary black hole mergers encode information about their environment and the astrophysical processes that led to their formation. Measuring the redshift dependence of their merger rate will help probe the formation and evolution of galaxies and the evolution of the star formation rate. Here we compute the cosmic evolution of the merger rate for stellar-mass binaries in the disks of Active Galactic Nuclei (AGNs). We focus on recent evolution out to redshift $z=2$, covering the accessible range of current Earth-based gravitational-wave observatories. On this scale, the AGN population density is the main contributor to redshift-dependence. We find that the AGN-assisted merger rate does not meaningfully evolve with redshift, differentiating this channel from field binaries and some other dynamical formation scenarios.
