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arXiv 1406.3201gr-qc
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用TIGER检验黑洞衰荡的无毛定理

Testing the no-hair theorem with black hole ringdowns using TIGER

J. Meidam, M. Agathos, C. Van Den Broeck, J. Veitch, B. S. Sathyaprakash

摘要:

爱因斯坦望远镜(ET)是一个拟议中的第三代引力波观测站,它将通过观察黑洞振铃信号的特征频率和阻尼时间来检验无毛定理。在以前的工作中,它表明,与一个单一的$500 - 1000\,M_\odot$黑洞的距离$\lesssim 6$ Gpc(或红移$z \lesssim 1$),在频率和阻尼时间的几个百分点的偏差的主导和次主导模式将在可检测的范围内。考虑到这样的源可能相对稀少,看看无毛定理在多大程度上可以用更远距离的事件和更小的信噪比来检验,从而访问更大的空间体积和更多的源,这是很有趣的。我们采用了一种名为TIGER(通用相对论测试基础设施)的模型选择方案,该方案最初是为了测试广义相对论而开发的,其微弱的二进制合并信号将在第二代探测器(如Advanced LIGO和Advanced Virgo)中看到。TIGER非常适用于低信噪比的情况,并且可以将来自多个源的信息结合起来,以实现更强的测试。通过使用爱因斯坦望远镜的预期噪声功率谱密度进行一系列的模拟,我们表明,与TIGER,类似的偏差,从无毛定理,在以前的工作中考虑将检测到极大的信心,使用均匀分布在共同移动体积到50 Gpc($z \lesssim 5$)的$\mathcal{O}(10)$源。

英文摘要:

The Einstein Telescope (ET), a proposed third-generation gravitational wave observatory, would enable tests of the no-hair theorem by looking at the characteristic frequencies and damping times of black hole ringdown signals. In previous work it was shown that with a single $500 - 1000\,M_\odot$ black hole at distance $\lesssim 6$ Gpc (or redshift $z \lesssim 1$), deviations of a few percent in the frequencies and damping times of dominant and sub-dominant modes would be within the range of detectability. Given that such sources may be relatively rare, it is of interest to see how well the no-hair theorem can be tested with events at much larger distances and with smaller signal-to-noise ratios, thus accessing a far bigger volume of space and a larger number of sources. We employ a model selection scheme called TIGER (Test Infrastructure for GEneral Relativity), which was originally developed to test general relativity with weak binary coalescence signals that will be seen in second-generation detectors such as Advanced LIGO and Advanced Virgo. TIGER is well-suited for the regime of low signal-to-noise ratio, and information from a population of sources can be combined so as to arrive at a stronger test. By performing a range of simulations using the expected noise power spectral density of Einstein Telescope, we show that with TIGER, similar deviations from the no-hair theorem as considered in previous work will be detectable with great confidence using $\mathcal{O}(10)$ sources distributed uniformly in co-moving volume out to 50 Gpc ($z \lesssim 5$).

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