Stochastic Gravitational-Wave Backgrounds: Current Detection Efforts and Future Prospects
Stochastic Gravitational-Wave Backgrounds: Current Detection Efforts and Future Prospects
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DOI：
10.3390/galaxies10010034
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发表时间：
2022-02
期刊：
影响因子：
2.5
通讯作者：
A. Renzini;B. Goncharov;A. Jenkins;P. Meyers
中科院分区：
文献类型：
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作者：
A. Renzini;B. Goncharov;A. Jenkins;P. Meyers
可单独分辨的引力波（GW）事件的集合只占到达我们探测器的所有GW信号的一小部分，而大多数都低于混淆极限并且未被检测到。类似于拥挤房间中的声音，未解析信号的收集产生了通过随机变量很好地描述的背景，因此被称为随机GW背景（SGWB）。在这篇综述中，我们提供了一个概述的随机GW信号和基于感兴趣的功能，如生成过程和观测性能的基础上，他们的。然后，我们回顾了目前的随机背景检测策略，提供了一个现成的手册随机GW搜索真实的数据。在此过程中，我们区分了地面或空基激光干涉仪对GW的干涉测量与脉冲星定时阵列（PTA）的定时残差分析。这些检测方法已被应用到真实的数据都由大型GW合作和较小的研究小组，最新的和有指导意义的结果在这里报道。最后，我们展望了未来的观测与第三代探测器，天基干涉仪，并在文献中提出的潜在的非干涉检测方法的审查。
The collection of individually resolvable gravitational wave (GW) events makes up a tiny fraction of all GW signals that reach our detectors, while most lie below the confusion limit and are undetected. Similarly to voices in a crowded room, the collection of unresolved signals gives rise to a background that is well-described via stochastic variables and, hence, referred to as the stochastic GW background (SGWB). In this review, we provide an overview of stochastic GW signals and characterise them based on features of interest such as generation processes and observational properties. We then review the current detection strategies for stochastic backgrounds, offering a ready-to-use manual for stochastic GW searches in real data. In the process, we distinguish between interferometric measurements of GWs, either by ground-based or space-based laser interferometers, and timing-residuals analyses with pulsar timing arrays (PTAs). These detection methods have been applied to real data both by large GW collaborations and smaller research groups, and the most recent and instructive results are reported here. We close this review with an outlook on future observations with third generation detectors, space-based interferometers, and potential noninterferometric detection methods proposed in the literature.