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arXiv 2012.03474gr-qcastro-ph.IM
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计算引力波的引力透镜衍射积分的不同方法的收敛性和效率

Convergence and Efficiency of Different Methods to Compute the Diffraction Integral for Gravitational Lensing of Gravitational Waves

Xiao Guo, Youjun Lu

摘要:

在研究引力波的透镜波形时,可能需要考虑波动光学。然而,在波动光学中,衍射积分(放大因子)的计算是具有挑战性和耗时的。因此,研究一种准确、有效的方法来计算放大系数,对于探测透镜GW系统是至关重要的。本文研究了引力波引力透镜衍射积分的收敛性,分析了计算该积分的几种数值方法的精度和效率,包括积分平均法、渐近展开法、Levin方法、零点积分法、进一步介绍了零点积分与渐近展开法相结合计算衍射积分的新方法,这为计算GWs的透镜化波形提供了一种有效而准确的方法。

英文摘要:

Wave optics may need to be considered when studying the lensed waveforms of gravitational waves (GWs). However, the computation of the diffraction integral (amplification factor) in wave optics is challenging and time-consuming. It is vital to develop an accurate and efficient method to calculate the amplification factor for detecting lensed GW systems. In this paper, we investigate the convergence of the diffraction integral for gravitational lensing of GWs and analyze the accuracy and efficiency of a number of numerical methods that can be used to calculate this integral, including the integral mean method, asymptotic expansion method, Levin's method, zero points integral method, etc. We further introduce a new method by combining the zero points integral and the asymptotic expansion methods to calculate the diffraction integral, which provides an efficient and accurate way to calculate the lensed waveform of GWs.

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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