Gravitational wave astronomy: the current status

David Blair; Li Ju; Chunnong Zhao; Linqing Wen; Qi Chu; Qi Fang; RongGen Cai; JiangRui Gao; XueChun Lin; Dong Liu; Ling-An Wu; ZongHong Zhu; David H. Reitze; Koji Arai; Fan Zhang; Raffaele Flaminio; Xingjiang Zhu; George Hobbs; Richard N. Manchester; Ryan M. Shannon; Carlo Baccigalupi; Peng Xu; Xing Bian; Zhoujian Cao; ZiJing Chang; Peng Dong; XueFei Gong; ShuangLin Huang; Peng Ju; ZiRen Luo; Li'E Qiang; WenLin Tang; XiaoYun Wan; Yue Wang; ShengNian Xu; YunLong Zhang; HaiPeng Zhang; Yun-Kau Lau; Wei-Tou Ni

arXiv · 1602.02872

Gravitational wave astronomy: the current status

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Abstract

In the centenary year of Einstein's General Theory of Relativity, this paper reviews the current status of gravitational wave astronomy across a spectrum which stretches from attohertz to kilohertz frequencies. Sect. 1 of this paper reviews the historical development of gravitational wave astronomy from Einstein's first prediction to our current understanding the spectrum. It is shown that detection of signals in the audio frequency spectrum can be expected very soon, and that a north-south pair of next generation detectors would provide large scientific benefits. Sect. 2 reviews the theory of gravitational waves and the principles of detection using laser interferometry. The state of the art Advanced LIGO detectors are then described. These detectors have a high chance of detecting the first events in the near future. Sect. 3 reviews the KAGRA detector currently under development in Japan, which will be the first laser interferometer detector to use cryogenic test masses. Sect. 4 of this paper reviews gravitational wave detection in the nanohertz frequency band using the technique of pulsar timing. Sect. 5 reviews the status of gravitational wave detection in the attohertz frequency band, detectable in the polarisation of the cosmic microwave background, and discusses the prospects for detection of primordial waves from the big bang. The techniques described in sects. 1-5 have already placed significant limits on the strength of gravitational wave sources. Sects. 6 and 7 review ambitious plans for future space based gravitational wave detectors in the millihertz frequency band. Sect. 6 presents a roadmap for development of space based gravitational wave detectors by China while sect. 7 discusses a key enabling technology for space interferometry known as time delay interferometry.

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David Blair, Li Ju, Chunnong Zhao, Linqing Wen, Qi Chu, Qi Fang, RongGen Cai, JiangRui Gao, XueChun Lin, Dong Liu, Ling-An Wu, ZongHong Zhu, David H. Reitze, Koji Arai, Fan Zhang, Raffaele Flaminio, Xingjiang Zhu, George Hobbs, Richard N. Manchester, Ryan M. Shannon, Carlo Baccigalupi, Peng Xu, Xing Bian, Zhoujian Cao, ZiJing Chang, Peng Dong, XueFei Gong, ShuangLin Huang, Peng Ju, ZiRen Luo, Li'E Qiang, WenLin Tang, XiaoYun Wan, Yue Wang, ShengNian Xu, YunLong Zhang, HaiPeng Zhang, Yun-Kau Lau, Wei-Tou Ni. 2016-02-09. Gravitational wave astronomy: the current status. https://arxiv.org/abs/1602.02872

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