Testing the Speed of Gravitational Waves over Cosmological Distances with Strong Gravitational Lensing
Testing the Speed of Gravitational Waves over Cosmological Distances with Strong Gravitational Lensing
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DOI：
10.1103/physrevlett.118.091101
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发表时间：
2017-03-02
影响因子：
8.6
通讯作者：
Bacon, David
中科院分区：
文献类型：
--
作者：
Collett, Thomas E.;Bacon, David
探测引力波和光的相对速度是对广义相对论和其他引力理论的重要检验。测量引力波（GW）和电磁波（EM）的到达时间可以用来测量相对速度，但前提是光子和引力波发射之间的固有时间滞后得到很好的理解。在这里，我们提出了一种方法，不作出这样的假设，使用未来的强透镜GW事件和EM对应物; Biesiada等人[J. Cosmol.阿斯特罗帕特10（2014）080]预测，爱因斯坦望远镜每年将观测到50-100个强透镜GW事件。如果在观测伽马射线爆发监测器的视场内观察到高能EM对应物，则单个强透镜GW事件将在10（-7）水平上对c（GW）/c（gamma）产生鲁棒的约束。
Probing the relative speeds of gravitational waves and light acts as an important test of general relativity and alternative theories of gravity. Measuring the arrival time of gravitational waves (GWs) and electromagnetic (EM) counterparts can be used to measure the relative speeds, but only if the intrinsic time lag between emission of the photons and gravitational waves is well understood. Here we suggest a method that does not make such an assumption, using future strongly lensed GW events and EM counterparts; Biesiada et al. [J. Cosmol. Astropart. Phys. 10 (2014) 080] forecast that 50-100 strongly lensed GW events will be observed each year with the Einstein Telescope. A single strongly lensed GW event would produce robust constraints on c(GW)/c(gamma) at the 10(-7) level, if a high-energy EM counterpart is observed within the field of view of an observing gamma-ray burst monitor.