Gravitational Wave Source Populations: Disentangling an AGN Component
Gravitational Wave Source Populations: Disentangling an AGN Component
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DOI：
10.3847/2041-8213/acbfb8
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发表时间：
2023-01
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通讯作者：
V. Gayathri;D. Wysocki;Y. Yang;V. Delfavero;R. O’Shaughnessy;Z. Haiman;H. Tagawa;I. Bartos
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文献类型：
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作者：
V. Gayathri;D. Wysocki;Y. Yang;V. Delfavero;R. O’Shaughnessy;Z. Haiman;H. Tagawa;I. Bartos
由LIGO和Virgo引力波天文台发现的90多个致密双星合并的天体物理起源是一个悬而未决的问题。虽然一些发现的物体的不寻常质量和自旋限制了祖先的情况，但观察到的合并与多种解释是一致的。解决这个问题的一个有前途的方法是考虑观察到的二元属性的分布，并将它们与不同起源场景的预期进行比较。在这里，我们描述了一个新的分层人口分析框架，同时评估不同的形成渠道的相对贡献。在这项研究中，我们认为在活动星系核（AGN）盘的二元形成沿着与唯象模型，但同样的框架可以扩展到其他模型。我们发现，高质量和高质量比的双星似乎更有可能有一个活动星系核的起源相比，具有相同的起源低质量的事件。未来对大质量黑洞合并的观测可能会进一步将活动星系核的成分从其他通道中分离出来。
The astrophysical origin of over 90 compact binary mergers discovered by the LIGO and Virgo gravitational wave observatories is an open question. While the unusual mass and spin of some of the discovered objects constrain progenitor scenarios, the observed mergers are consistent with multiple interpretations. A promising approach to solve this question is to consider the observed distributions of binary properties and compare them to expectations from different origin scenarios. Here we describe a new hierarchical population analysis framework to assess the relative contribution of different formation channels simultaneously. For this study we considered binary formation in active galactic nucleus (AGN) disks along with phenomenological models, but the same framework can be extended to other models. We find that high-mass and high-mass-ratio binaries appear more likely to have an AGN origin compared to having the same origin as lower-mass events. Future observations of high-mass black hole mergers could further disentangle the AGN component from other channels.