检验GW231123的虫洞回声假说
Testing the wormhole echo hypothesis for GW231123
AI总结：
本文检验GW231123是否符合虫洞回声假说，通过建模回声脉冲并进行贝叶斯模型比较，发现其支持程度高于GW190521。
摘要：
短持续时间的引力波事件GW231123推断出的组件质量位于双星不稳定性质量间隙内，并表现出爆发状形态，没有明显吸积过程，使其成为检验超越标准双黑洞（BBH）解释的有趣目标。在本工作中，受其现象学相似性与GW190521的启发，我们通过建模一个主导的回声脉冲，使用具有良好动机的现象学正弦高斯波包，检验GW231123是否符合虫洞回声场景。我们通过IMRPhenomXPHM-SpinTaylor波形描述的BBH基线进行贝叶斯模型比较，并获得贝叶斯因子比lnB^Echo_BBH=1.87，对应于对回声假说的弱到中等支持。在我们之前针对GW190521的相同整体框架分析中，我们发现lnB^Echo_BBH≈-2.9，表明这两个事件之间的lnB变化量约为4.8。这种符号变化表明GW231123比GW190521更符合单脉冲回声描述。
英文摘要：
The short-duration gravitational-wave (GW) event GW231123 has component masses inferred to lie in the pair-instability mass gap and exhibits a burst-like morphology without a clear inspiral phase, making it an interesting target for testing alternatives to the standard binary black hole (BBH) interpretation. Motivated by its phenomenological similarity to GW190521, we test a wormhole-echo interpretation by modeling a leading echo pulse with a phenomenological \texttt{sine-Gaussian} wavepacket. Bayesian model comparison against a BBH interpretation described by the \texttt{IMRPhenomXPHM-SpinTaylor} waveform yields $\ln \mathcal{B}^{\rm Echo}_{\rm BBH}=1.87$. This preference is sensitive to the BBH waveform family and Echo-prior choices, and the observed statistic is not unusual within the targeted BBH-null ensembles. The positive Bayes factor therefore does not provide robust evidence for a wormhole-echo interpretation, with the analyses considered here supporting the standard BBH interpretation of GW231123.
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