Amplitude and phase fluctuations of gravitational waves magnified by strong gravitational lensing
Amplitude and phase fluctuations of gravitational waves magnified by strong gravitational lensing
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DOI：
10.1103/physrevd.106.043532
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发表时间：
2022-04
影响因子：
5
通讯作者：
M. Oguri;R. Takahashi
中科院分区：
文献类型：
--
作者：
M. Oguri;R. Takahashi
我们讨论了菲涅耳尺度上的小尺度密度扰动如何影响引力波的振幅和相位，这些引力波被几何光学中的引力透镜放大了艾德。我们推导出将小尺度密度扰动与振幅和相位扰动联系起来的方程，以表明这种微扰波光学效应在宏观模型放大的情况下得到了显著增强，从而可以很容易地观察到高度放大的艾德引力波的振幅和相位扰动。我们讨论了恒星微透镜、暗物质子结构、模糊暗物质和原始黑洞产生的预期信号。
We discuss how small-scale density perturbations on the Fresnel scale affect amplitudes and phases of gravitational waves that are magnified by gravitational lensing in geometric optics. We derive equations that connect the small-scale density perturbations with the amplitude and phase fluctuations to show that such perturbative wave optics effects are significantly boosted in the presence of macro model magnifications such that amplitude and phase fluctuations can easily be observed for highly magnified gravitational waves. We discuss expected signals due to microlensing by stars, dark matter substructure, fuzzy dark matter, and primordial black holes.