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arXiv 2104.14829gr-qcastro-ph.IM
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连续引力波传播的似然比解析边际化的几何方法

Geometric Approach to Analytic Marginalisation of the Likelihood Ratio for Continuous Gravitational Wave Searches

Karl Wette

摘要:

连续引力波信号的似然比在几何上被看作是两个向量的方向的函数;一个表示最佳信噪比,另一个表示最大似然比或$\mathcal{F}$统计量。在向量之间的角度上的分析边缘化产生边缘化似然比,其是$\mathcal{F}$统计量的函数。进一步分析边缘化的最佳信噪比探索使用不同的选择之前。蒙特卡罗模拟表明,边缘化的似然比具有相同的检测功率的$\mathcal{F}$ -统计。这种方法展示了一种在贝叶斯上下文中查看$\mathcal{F}$统计量的方法,同时保留了其高效计算的优点。

英文摘要:

The likelihood ratio for a continuous gravitational wave signal is viewed geometrically as a function of the orientation of two vectors; one representing the optimal signal-to-noise ratio, the other representing the maximised likelihood ratio or $\mathcal{F}$-statistic. Analytic marginalisation over the angle between the vectors yields a marginalised likelihood ratio which is a function of the $\mathcal{F}$-statistic. Further analytic marginalisation over the optimal signal-to-noise ratio is explored using different choices of prior. Monte-Carlo simulations show that the marginalised likelihood ratios have identical detection power to the $\mathcal{F}$-statistic. This approach demonstrates a route to viewing the $\mathcal{F}$-statistic in a Bayesian context, while retaining the advantages of its efficient computation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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