论文标题
重力会掉下来吗？沿着视线到GW 170817的重力波挠度的证据
Does Gravity Fall Down? Evidence for Gravitational Wave Deflection Along the Line of Sight to GW 170817
论文作者
论文摘要
我们提出了一项新的一般相对性测试（GR）：测量由于重力镜头而引起的时间延迟的几何成分。 GR预测光子和重力波遵循相同的测量路径，因此经历了相同的几何时间延迟。我们表明，对于典型的系统，时间延迟是数十秒钟，因此可以在光子发射时间的天体物理延迟上占主导地位。对于GW 170817的情况，我们使用多平面镜头代码来评估由于视线沿线的四个巨大光晕引起的时间延迟。从这些光环的文献质量和距离测量值中，我们以高置信度（显着大于5 sigma），GW 170817的重力波经历了重力偏转，以在光子的1.7秒内到达。
We present a novel test of general relativity (GR): measuring the geometric component of the time delay due to gravitational lensing. GR predicts that photons and gravitational waves follow the same geodesic paths and thus experience the same geometric time delay. We show that for typical systems, the time delays are tens of seconds, and thus can dominate over astrophysical delays in the timing of photon emission. For the case of GW 170817, we use a multi-plane lensing code to evaluate the time delay due to four massive halos along the line of sight. From literature mass and distance measurements of these halos, we establish at high confidence (significantly greater than 5 sigma) that the gravitational waves of GW 170817 underwent gravitational deflection to arrive within 1.7 seconds of the photons.
