论文标题
评估带有贝叶斯赔率的重力波二进制黑洞候选者
Assessing gravitational-wave binary black hole candidates with Bayesian odds
论文作者
论文摘要
通过贝叶斯网络的选择，可以通过贝叶斯网络的选择来区分二元黑洞合并的重力波，通过利用跨网络的信号的连贯性，将其与检测器网络中的噪声瞬变区分开。我们提出了一个贝叶斯框架，用于计算信号是天体物理起源的后验概率，对特定的搜索策略，管道或搜索域的不可知论，并确定了候选人的搜索域。我们根据\ textit {相同的假设应用此框架，以对Ligo-Virgo GWTC-1目录中报告的所有事件，GW190412以及其他作者独立搜索管道报告的许多事件候选者。除GW170818外，我们发现所有GWTC-1候选者和GW190412都具有绝大多数的赔率，赞成天体物理假说，包括GW170729，其中包括GWTC-1中使用的不同搜索管道分配了明显不同的天体物理概率。 GW170818是单个检测器触发的事实，因此毫不奇怪的是，它被认为是由天体物理源在我们的框架中产生的。我们发现\ textIt {三}其他事件候选者GW170121，GW170425和GW170727，它们对天体物理假设有重大支持，并且概率是信号分别为0.53、0.74和0.64的天文学起源。我们进行了一项分层人群研究，除了GWTC-1中报道的事件外，还包括这三个事件，发现主要的天体物理结果不受影响。
Gravitational waves from the coalescence of binary black holes can be distinguished from noise transients in a detector network through Bayesian model selection by exploiting the coherence of the signal across the network. We present a Bayesian framework for calculating the posterior probability that a signal is of astrophysical origin, agnostic to the specific search strategy, pipeline or search domain with which a candidate is identified. We apply this framework under \textit{identical} assumptions to all events reported in the LIGO-Virgo GWTC-1 catalog, GW190412 and numerous event candidates reported by independent search pipelines by other authors. With the exception of GW170818, we find that all GWTC-1 candidates, and GW190412, have odds overwhelmingly in favour of the astrophysical hypothesis, including GW170729, which was assigned significantly different astrophysical probabilities by the different search pipelines used in GWTC-1. GW170818 is de-facto a single detector trigger, and is therefore of no surprise that it is disfavoured as being produced by an astrophysical source in our framework. We find \textit{three} additional event candidates, GW170121, GW170425 and GW170727, that have significant support for the astrophysical hypothesis, with a probability that the signal is of astrophysical origin of 0.53, 0.74 and 0.64 respectively. We carry out a hierarchical population study which includes these three events in addition to those reported in GWTC-1, finding that the main astrophysical results are unaffected.
