统一空间相关性与分层总体推断以约束双黑洞并合的AGN通道
Unifying spatial correlation with hierarchical population inference to constrain the AGN channel for binary black hole mergers
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中文总结 AI 辅助
本研究提出统一空间相关性与分层总体推断的贝叶斯框架，结合GWTC-5.0和Quaia目录约束AGN通道对BBH并合的贡献，并给出95%可信度下的排除上限。
中文摘要 AI 辅助
LIGO-Virgo-KAGRA（LVK）探测器在引力波（GW）事件中观测到的恒星质量双黑洞（BBH）的起源仍不确定。一个有前景的形成途径是活动星系核（AGN）通道，其中嵌入AGN吸积盘的BBH经历增强的并合率，并可能在上质量间隙中产生快速旋转的黑洞。先前对AGN对LVK并合总体贡献的约束要么依赖于GW定位与AGN目录之间的空间相关性，要么依赖于对GW源内在性质的建模。我们开发了一个分层贝叶斯框架，在单一似然中统一了这些方法，用于估计AGN宿主GW事件的比例$f_{\rm agn}$。该框架结合最新的引力波瞬变目录GWTC-5.0和电磁Quaia AGN目录，无法排除AGN对观测并合率的贡献。对于在光学和红外波段未被遮蔽、且具有热光度$L_{\rm bol}\geq\{10^{44.5},10^{45.5},10^{46.5}\}\\,\mathrm{erg\\,s^{-1}}$的AGN，在我们的基准模型下，以95%可信度排除了$f_{\rm agn} \geq \{0.52,0.41, 0.61\}$。本工作提出的方法和结果为将完整GW后验与电磁观测相结合以推断GW总体和AGN盘的性质铺平了道路。
英文摘要
The origin of the stellar-mass binary black holes (BBHs) observed in gravitational wave (GW) events by the LIGO-Virgo-KAGRA (LVK) detectors remains uncertain. One promising formation pathway is the active galactic nucleus (AGN) channel, in which BBHs embedded in AGN accretion discs experience enhanced merger rates and may produce rapidly spinning black holes in the upper mass gap. Previous constraints on the AGN contribution to the LVK merger population have relied either on spatial correlations between GW localisations and AGN catalogues or on modelling the intrinsic properties of GW sources. We develop a hierarchical Bayesian framework that unifies these approaches within a single likelihood for the fraction of AGN-hosted GW events, $f_{\rm agn}$. This framework, combined with the latest gravitational wave transient catalogue GWTC-5.0 and the electromagnetic Quaia AGN catalogue, cannot exclude an AGN contribution to the observed merger rate. For unobscured AGN in the optical and infrared bands with bolometric luminosities $L_{\rm bol}\geq\{10^{44.5},10^{45.5},10^{46.5}\}\,\mathrm{erg\,s^{-1}}$, we exclude $f_{\rm agn} \geq \{0.52,0.41, 0.61\}$ at the 95 percent credible level under our fiducial model. The methodology and results presented in this work lay down the pathway for combining the full GW posterior with electromagnetic observations to infer the properties of GW populations and AGN discs.
发表机构
- Leiden University（莱顿大学）
- European Space Agency (ESA)（欧洲航天局）
- Washington State University（华盛顿州立大学）
机构由 AI 辅助整理，请以论文原文为准。
