GWTC-3的多准圆模型分析
Analysis of GWTC-3 with multiple quasicircular models
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中文总结 AI 辅助
本研究使用一致框架和多种波形模型重新分析GWTC-3等60个引力波事件，发现新旧模型结论差异，并识别出数据发布中的错误，强调多模型验证的重要性。
中文摘要 AI 辅助
引力波源的物理解释依赖于用于解读信号的特定模型选择。先前使用SEOBNRv4PHM、IMRPhenomXPHM和NRSur7dq4对GWTC-3事件候选体的分析，有时对事件属性得出了显著不同的结论。微妙的分析设置和代码差异也可能产生显著差异。我们重新审视了来自前三次观测运行、分别发布于GWTC-1、GWTC-2、GWTC-2.1和GWTC-3中的60个公开事件，使用一致的分析框架和三种波形模型：两种包含高阶模式的最先进时域模型（SEOBNRv5PHM和IMRPhenomTPHM）以及一种不包含高阶模式的较老频域模型（IMRPhenomPv2）。两种最先进的模型总体吻合良好，尽管约20%的事件在至少一个一维边际后验中存在可见差异。相比之下，较老的模型常常对跨质量谱的关键事件得出定性不同的结论。我们还识别了已发布的LVK GWTC-2.1 SEOBNRv4PHM结果以及后来对GW200105的重新处理中存在的一个错误。在所采用的采样率下，该模型的奈奎斯特频率限制排除了部分允许的参数空间，并人为地截断了七个低质量事件的质量比后验，使其偏离等质量。这些结果强调了使用多种最先进波形模型和经过仔细验证的分析设置来表征引力波源属性不确定性的必要性。
英文摘要
The interpretation of gravitational wave sources depends on the specific choice of model used to interpret signals. Previous analyses of GWTC-3 event candidates using SEOBNRv4PHM, IMRPhenomXPHM, and NRSur7dq4 have sometimes arrived at notably different conclusions about event properties. Subtle analysis settings and code differences can also produce notable differences. We revisit 60 publicly available events from the first three observing runs, released across GWTC-1, GWTC-2, GWTC-2.1, and GWTC-3, using a consistent analysis framework and three waveform models: two state-of-the-art time-domain models with higher-order modes (SEOBNRv5PHM and IMRPhenomTPHM) and one older frequency-domain model without higher-order modes (IMRPhenomPv2). The two state-of-the-art models agree well overall, although about 20\% of events have a visible difference in at least one one-dimensional marginal posterior. By contrast, the older model often arrives at qualitatively different conclusions for key events across the mass spectrum. We also identify a bug in published LVK GWTC-2.1 SEOBNRv4PHM results and in a later reprocessing of GW200105. At the adopted sampling rates, the model's Nyquist-frequency restriction excluded part of the allowed parameter space and artificially truncated the mass-ratio posterior away from equal mass for seven low-mass events. These results emphasize the need to use multiple state-of-the-art waveform models and carefully validated analysis settings to characterize uncertainty in gravitational-wave source properties.
发表机构
- Rochester Institute of Technology（罗切斯特理工学院）
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