Black hole spectroscopy for KAGRA future prospect in O5
Black hole spectroscopy for KAGRA future prospect in O5
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DOI：
10.1103/physrevd.102.024007
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发表时间：
2020-03
影响因子：
5
通讯作者：
N. Uchikata;T. Narikawa;K. Sakai;H. Takahashi;H. Nakano
中科院分区：
文献类型：
--
作者：
N. Uchikata;T. Narikawa;K. Sakai;H. Takahashi;H. Nakano
致密双星合并产生的衰荡引力波是检验广义相对论的重要目标。合并后的振铃波形的主要成分是黑洞准正规模。在广义相对论中，黑洞的所有多极拟正规模应该给出相同的黑洞参数值。虽然到目前为止观测到的双黑洞事件还不足以用振铃引力波进行测试，但预计测试将在第三代探测器中实现。日本引力波探测器KAGRA（目前的配置称为bKAGRA）已经开始观测，未来升级计划的讨论也已开始。在这项研究中，我们考虑哪一个KAGRA升级计划是最好的检测黑洞的次主导准正规模的目的是检验广义相对论。我们使用一个数值相关性波形作为注入信号，其中包含两个多极模式，并通过匹配滤波分析每个模式。我们的研究结果表明，FDSQZ方案提高了KAGRA在宽频率范围内的灵敏度，是最适合黑洞光谱学的方案。
Ringdown gravitational waves of compact binary mergers are an important target to test general relativity. The main components of the ringdown waveform after merger are black hole quasinormal modes. In general relativity, all multipolar quasinormal modes of a black hole should give the same values of black hole parameters. Although the observed binary black hole events so far are not significant enough to perform the test with ringdown gravitational waves, it is expected that the test will be achieved in third generation detectors. The Japanese gravitational wave detector KAGRA, called bKAGRA for the current configuration, has started observation, and discussions for the future upgrade plans have also started. In this study, we consider which KAGRA upgrade plan is the best to detect the subdominant quasinormal modes of black holes in the aim of testing general relativity. We use a numerical relativity waveform as injected signals that contains two multipolar modes and analyze each mode by matched filtering. Our results suggest that the plan FDSQZ, which improves the sensitivity of KAGRA for broad frequency range, is the most suitable configuration for black hole spectroscopy.