论文标题
自动发现可解释的重力波种群模型
Automated discovery of interpretable gravitational-wave population models
论文作者
论文摘要
我们提出了一种自动方法，可以从数据中发现重力波（GW）事件的分析人群模型。随着检测到更多引力波（GW）事件，由于表现性的表现性，诸如高斯混合模型之类的柔性模型（例如高斯混合模型）变得越来越重要。但是，灵活的模型带有许多缺乏身体动机的参数，从而解释这些模型的含义具有挑战性。在这项工作中，我们证明了符号回归可以通过将这种柔性模型的后验预测分布提炼成可解释的分析表达式来补充灵活模型。我们恢复了常见的GW人群模型，例如Power-Law-Plus-Gaussian，并找到了结合准确性和简单性的新经验人群模型。这表明了一种在不断增长的GW目录中自动发现可解释的种群模型的策略，该模型可能会应用于其他天体物理现象。
We present an automatic approach to discover analytic population models for gravitational-wave (GW) events from data. As more gravitational-wave (GW) events are detected, flexible models such as Gaussian Mixture Models have become more important in fitting the distribution of GW properties due to their expressivity. However, flexible models come with many parameters that lack physical motivation, making interpreting the implication of these models challenging. In this work, we demonstrate symbolic regression can complement flexible models by distilling the posterior predictive distribution of such flexible models into interpretable analytic expressions. We recover common GW population models such as a power-law-plus-Gaussian, and find a new empirical population model which combines accuracy and simplicity. This demonstrates a strategy to automatically discover interpretable population models in the ever-growing GW catalog, which can potentially be applied to other astrophysical phenomena.
