论文标题
当地宇宙中恒星质量黑洞合并和主动银河核之间空间相关性的可检测性
Detectability of a spatial correlation between stellar-mass black hole mergers and Active Galactic Nuclei in the Local Universe
论文作者
论文摘要
Ligo-Virgo-Kagra(LVK)合作检测到的引力波(GWS)的二进制黑洞(BBH)合并的起源仍在争论中。一个基本原因是我们对他们的宿主环境的无知,因为事件的本地化量的典型大小很容易包含数千个星系。围绕此的策略是利用统计方法来评估这些合并与天体物理动机的宿主星系类型之间的空间相关性,例如主动银河核(AGN)。我们使用一种似然比方法将GW-AGN连接的程度推断为$ z = 0.2 $。我们模拟了BBH合并,其成分的质量是根据基础黑洞(BHS)的现实分布进行采样的。假设两种不同的干涉网络配置,计算了这些事件的本地化量。这些对应于第三(O3)和即将到来的第四(O4)LVK观察运行的配置。我们得出的结论是,第三次观察在$ z \ leq0.2 $中检测到的13个BBH合并不足以拒绝(3σ\)的意义,该假设是根据该假说,GW和AGN之间没有任何联系,而不是$ \ $ \ $ \ 10^{44.3} \ rm {44.3} \ rm {erg} $ {高于\ \(10^{ - 4.75} \ textrm {mpc}^{ - 3} \)。但是,当考虑稀有类别的AGN类别时,13个检测足以拒绝此无连接假设,降射仪高于$ \ of $ \ 10^{45.5} \ rm {erg {erg} \ \ \ \ \ \ \ rm {s}^{ - 1} $。我们估计O4结果可能会使我们能够从高于\ \(80 \%\)的任何发光度的AGN对BBH合并总数进行分数贡献。
The origin of the Binary Black Hole (BBH) mergers detected through Gravitational Waves (GWs) by the LIGO-Virgo-KAGRA (LVK) collaboration remains debated. One fundamental reason is our ignorance of their host environment, as the typical size of an event's localization volume can easily contain thousands of galaxies. A strategy around this is to exploit statistical approaches to assess the spatial correlation between these mergers and astrophysically motivated host galaxy types, such as Active Galactic Nuclei (AGN). We use a Likelihood ratio method to infer the degree of GW-AGN connection out to $z=0.2$. We simulate BBH mergers whose components' masses are sampled from a realistic distribution of the underlying population of Black Holes (BHs). Localization volumes for these events are calculated assuming two different interferometric network configurations. These correspond to the configuration of the third (O3) and of the upcoming fourth (O4) LVK observing runs. We conclude that the 13 BBH mergers detected during the third observing run at $z\leq0.2$ are not enough to reject with a \(3σ\) significance the hypothesis according to which there is no connection between GW and AGN more luminous than $\approx 10^{44.3}\rm{erg}\ \rm{s}^{-1}$, that have number density higher than \(10^{-4.75}\textrm{Mpc}^{-3}\). However, 13 detections are enough to reject this no-connection hypothesis when rarer categories of AGN are considered, with bolometric luminosities greater than $\approx 10^{45.5}\rm{erg}\ \rm{s}^{-1}$. We estimate that O4 results will potentially allow us to test fractional contributions to the total BBH merger population from AGN of any luminosity higher than \(80\%\).