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Gravitational wave astronomy - astronomy of the 21~(st) century

机译：引力波天文学-21〜（st）世纪的天文学

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摘要

An enigmatic prediction of Einstein’s general theory of relativity is gravitational waves. With the observed decay in the orbit of the Hulse-Taylor binary pulsar agreeing within a fraction of a percent with the theoretically computed decay from Einstein’s theory, the existence of gravitational waves was firmly established. Currently there is a worldwide effort to detect gravitational waves with inteferometric gravitational wave observatories or detectors and several such detectors have been built or being built. The initial detectors have reached their design sensitivities and now the effort is on to construct advanced detectors which are expected to detect gravitational waves from astrophysical sources. The era of gravitational wave astronomy has arrived. This article describes the worldwide effort which includes the effort on the Indian front - the IndIGO project -, the principle underlying interferometric detectors both on ground and in space, the principal noise sources that plague such detectors, the astrophysical sources of gravitational waves that one expects to detect by these detectors and some glimpse of the data analysis methods involved in extracting the very weak gravitational wave signals from detector noise.
机译：对爱因斯坦广义相对论的一个神秘预测是引力波。在观察到的Hulse-Taylor二元脉冲星的轨道衰减与爱因斯坦理论的理论计算衰减相差不到一个百分点的情况下，就牢固地建立了引力波的存在。当前，世界范围内正在努力使用干涉式重力波观测器或探测器来检测重力波，并且已经建造或正在建造多个这样的探测器。最初的探测器已经达到其设计灵敏度，现在正在努力构建先进的探测器，这些探测器有望探测来自天体物理源的引力波。引力波天文学时代已经到来。本文介绍了全球范围内的努力，其中包括印度方面的努力-IndIGO项目-地面和太空干涉式探测器的基本原理，困扰此类探测器的主要噪声源，人们期望的天体引力波源通过这些探测器进行探测，并对从探测器噪声中提取非常弱的引力波信号所涉及的数据分析方法有所了解。

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