Stochastic gravitational wave backgrounds
Stochastic gravitational wave backgrounds
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DOI：
10.1088/1361-6633/aae6b5
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发表时间：
2018-11
影响因子：
18.1
通讯作者：
N. Christensen
中科院分区：
文献类型：
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作者：
N. Christensen
引力波的随机背景可以由大量独立源的叠加产生。在宇宙最早期发生的物理过程当然创造了一种随机背景，这种背景在某种程度上存在于今天。这类似于宇宙微波背景辐射，它是早期宇宙的电磁记录。最近由Advanced LIGO和Advanced Virgo探测器对引力波的观测表明，在宇宙的历史上，也有一个由双黑洞和双中子星星合并产生的随机背景。无论随机背景是直接观察到的，还是在特定频带中对其设置上限，都可以对它进行重要的天体物理学和宇宙学陈述。这篇综述将总结随机背景的研究现状，从这些引力波的来源到目前用于观测它们的方法。
A stochastic background of gravitational waves could be created by the superposition of a large number of independent sources. The physical processes occurring at the earliest moments of the universe certainly created a stochastic background that exists, at some level, today. This is analogous to the cosmic microwave background, which is an electromagnetic record of the early universe. The recent observations of gravitational waves by the Advanced LIGO and Advanced Virgo detectors imply that there is also a stochastic background that has been created by binary black hole and binary neutron star mergers over the history of the universe. Whether the stochastic background is observed directly, or upper limits placed on it in specific frequency bands, important astrophysical and cosmological statements about it can be made. This review will summarize the current state of research of the stochastic background, from the sources of these gravitational waves to the current methods used to observe them.