The chemically homogeneous evolutionary channel for binary black hole mergers: rates and properties of gravitational-wave events detectable by advanced LIGO
The chemically homogeneous evolutionary channel for binary black hole mergers: rates and properties of gravitational-wave events detectable by advanced LIGO
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DOI：
10.1093/mnras/stw1219
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发表时间：
2016-03
影响因子：
4.8
通讯作者：
S. D. Mink;I. Mandel
中科院分区：
文献类型：
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作者：
S. D. Mink;I. Mandel
我们探索了对大质量短周期恒星双星中化学均匀演化形成的合并双黑洞的可探测引力波信号的预测。我们发现，使用全灵敏度运行的先进地面探测器每年可以探测到约 500 起事件。我们分析了可检测事件的分布，并得出结论，人们非常倾向于检测具有几乎相等成分（在我们的默认模型中，90%置信度下质量比>0.66）和高质量（90%置信度下，总源帧质量在57到103 M⊙之间）的事件。我们考虑多种替代变化来分析对演化物理和宇宙学参数的不确定性的敏感性，并得出结论，虽然速率对假设的变化敏感，但质量分布是稳健的预测。最后，我们考虑最近报道的O1 LIGO（激光干涉仪引力波天文台）观测运行的前16个双重合天的分析结果，发现该形成通道与GW150914双黑洞探测的推断参数和推断的合并率完全一致。
We explore the predictions for detectable gravitational-wave signals from merging binary black holes formed through chemically homogeneous evolution in massive short-period stellar binaries. We find that ∼500 events per year could be detected with advanced ground-based detectors operating at full sensitivity. We analyse the distribution of detectable events, and conclude that there is a very strong preference for detecting events with nearly equal components (mass ratio >0.66 at 90 per cent confidence in our default model) and high masses (total source-frame mass between 57 and 103 M⊙ at 90 per cent confidence). We consider multiple alternative variations to analyse the sensitivity to uncertainties in the evolutionary physics and cosmological parameters, and conclude that while the rates are sensitive to assumed variations, the mass distributions are robust predictions. Finally, we consider the recently reported results of the analysis of the first 16 double-coincident days of the O1 LIGO (Laser Interferometer Gravitational-wave Observatory) observing run, and find that this formation channel is fully consistent with the inferred parameters of the GW150914 binary black hole detection and the inferred merger rate.