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Ground-based gravitational wave detection and its implications
Journal of the Korean Physical Society ( IF 0.8 ) Pub Date : 2021-02-26 , DOI: 10.1007/s40042-021-00088-0
Gungwon Kang

A bit of historical review is given for the concept of gravitational waves and detection experiments. In the presence of gravitational waves, it is frequently asked whether the laser light gets stretched and shrunk in the same way as the mirror distances in the interferometer so that gravitational waves cannot be measured. To answer this question, we have reviewed the interaction between light and gravitational waves carefully in both the transverse-traceless (TT) gauge and the proper detector or locally Lorentz frame. In the TT frame, the laser light directly interacts with gravitational waves, its frequency gets modified, but mirrors remain at rest to the linear order of a gravitational wave perturbation. In the detector frame, on the other hand, the frequency of light does not change while “distances” between the beam splitter and the mirrors get modified. Recent results for gravitational wave observations up to the first half of the third observation run in the advanced LIGO and the advanced Virgo are briefly summarized. Tests of general relativity based on gravitational wave data observed during O1 and O2 are described. These tests include residual and inspiral–merger–ringdown signal consistency tests, parameterized deviations in the waveform model, and constraint on the speed of gravitational waves by comparisons with the propagation of the electro-magnetic counterpart observed in the binary neutron star merger event. Some interesting events observed during O3a are also discussed.



中文翻译:

地基重力波检测及其意义

引力波和探测实验的概念已有一些历史回顾。在存在引力波的情况下,经常会问到激光是否会以与干涉仪中镜面距离相同的方式被拉伸和收缩,从而无法测量引力波。为了回答这个问题,我们已经仔细研究了横向无迹线(TT)规和适当的探测器或局部Lorentz框架中光波与引力波之间的相互作用。在TT框架中,激光直接与重力波相互作用,其频率会发生变化,但反射镜会保持静止状态,直到重力波扰动的线性量级为止。另一方面,在探测器框架中,当分束器和反射镜之间的“距离”改变时,光的频率不会改变。简要总结了在高级LIGO和高级处女座中进行的重力波观测的最新结果,直到第三次观测的上半部分。描述了基于在O1和O2期间观察到的引力波数据的广义相对论测试。这些测试包括残差和吸气-合并-降压信号一致性测试,波形模型中的参数化偏差以及通过与双星中子星合并事件中观察到的电磁对应物的传播进行比较而对引力波速度的约束。还讨论了在O3a期间观察到的一些有趣事件。简要总结了在高级LIGO和高级处女座中进行的重力波观测的最新结果,直到第三次观测的上半部分。描述了基于在O1和O2期间观察到的引力波数据的广义相对论测试。这些测试包括残差和吸气-合并-降压信号一致性测试,波形模型中的参数化偏差以及通过与双星中子星合并事件中观察到的电磁对应物的传播进行比较而对引力波速度的约束。还讨论了在O3a期间观察到的一些有趣事件。简要总结了在高级LIGO和高级处女座中进行的重力波观测的最新结果,直到第三次观测的上半部分。描述了基于在O1和O2期间观察到的引力波数据的广义相对论测试。这些测试包括残差和吸气-合并-降压信号一致性测试,波形模型中的参数化偏差以及通过与双星中子星合并事件中观察到的电磁对应物的传播进行比较而对引力波速度的约束。还讨论了在O3a期间观察到的一些有趣事件。这些测试包括残差和吸气-合并-降压信号一致性测试,波形模型中的参数化偏差以及通过与双星中子星合并事件中观察到的电磁对应物的传播进行比较而对引力波速度的约束。还讨论了在O3a期间观察到的一些有趣事件。这些测试包括残差和吸气-合并-降压信号一致性测试,波形模型中的参数化偏差以及通过与双星中子星合并事件中观察到的电磁对应物的传播进行比较而对引力波速度的约束。还讨论了在O3a期间观察到的一些有趣事件。

更新日期:2021-02-26
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