Testing the anisotropy of the universe using the simulated gravitational wave events from advanced LIGO and Virgo

Testing the anisotropy of the universe using the simulated gravitational wave events from advanced LIGO and Virgo
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使用先进的 LIGO 和 Virgo 的模拟引力波事件测试宇宙的各向异性

DOI:
10.1140/epjc/s10052-018-5841-x
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发表时间:
2018-02
影响因子:
4.4
通讯作者:
Li Xin
Li Xin
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Lin Hai Nan;Li Jin;Li Xin

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引力波的探测为约束宇宙学参数提供了强有力的工具。在本文中,我们探讨了使用引力波作为宇宙各向异性检验标准的可能性。我们认为GW信号产生的合并的双黑洞系统和模拟数百GW事件从先进的激光干涉仪引力波天文台和处女座。我们发现,如果GW源的红移是精确已知的,宇宙的各向异性可以被严格约束。如果观测到GW事件,各向异性振幅的约束精度可以与Ia型超新星的Union 2.1并发症相媲美。至于首选方向,需要GW事件,以达到Union2.1的准确性。对于800 GW事件,具有与Union2.1相当的幅度的伪各向异性信号的概率可以忽略不计。这些结果表明,在检验宇宙的各向异性方面,引力波可以提供超新星的补充工具。
The detection of gravitational waves (GWs) provides a powerful tool to constrain the cosmological parameters. In this paper, we investigate the possibility of using GWs as standard sirens in testing the anisotropy of the universe. We consider the GW signals produced by the coalescence of binary black hole systems and simulate hundreds of GW events from the advanced laser interferometer gravitational-wave observatory and Virgo. It is found that the anisotropy of the universe can be tightly constrained if the redshift of the GW source is precisely known. The anisotropic amplitude can be constrained with an accuracy comparable to the Union2.1 complication of type-Ia supernovae ifGW events are observed. As for the preferred direction,GW events are needed in order to achieve the accuracy of Union2.1. With 800 GW events, the probability of pseudo anisotropic signals with an amplitude comparable to Union2.1 is negligible. These results show that GWs can provide a complementary tool to supernovae in testing the anisotropy of the universe.
Ia型超新星中隐藏的各向异性信号的意义
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