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arXiv 0707.1202gr-qcastro-ph
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振铃波形的匹配滤波与参数估计

Matched-filtering and parameter estimation of ringdown waveforms

Emanuele Berti, Jaime Cardoso, Vitor Cardoso, Marco Cavaglia

摘要:

使用最近的结果,从数值相对论模拟的非自旋二进制黑洞合并,我们重新审视的问题,检测振铃波形和估计的源参数,考虑LISA和地球上的干涉仪。我们发现,先进的LIGO和EGO可以检测到中等质量的黑洞的质量高达约1000太阳质量的光度距离的几个Gpc。对于典型的多极能量分布,我们表明,目前使用的单模衰荡模板在LIGO数据流中的衰荡搜索可以产生显着的事件损失(> 10%的黑洞质量的大间隔的所有探测器)和非常大的参数估计误差的黑洞的质量和自旋。我们估计单阶段多模式搜索需要超过10^6个模板。因此,我们建议使用“两阶段”搜索来节省计算成本:单模式模板可用于检测,但一旦检测完成,应使用多模式模板或Prony方法来估计参数。我们更新的关键信噪比的估计需要测试的假设,两个或更多的模式存在于信号中,并解决他们的频率,显示第二代地球为基础的探测器和LISA有可能进行无头发测试。

英文摘要:

Using recent results from numerical relativity simulations of non-spinning binary black hole mergers we revisit the problem of detecting ringdown waveforms and of estimating the source parameters, considering both LISA and Earth-based interferometers. We find that Advanced LIGO and EGO could detect intermediate-mass black holes of mass up to about 1000 solar masses out to a luminosity distance of a few Gpc. For typical multipolar energy distributions, we show that the single-mode ringdown templates presently used for ringdown searches in the LIGO data stream can produce a significant event loss (> 10% for all detectors in a large interval of black hole masses) and very large parameter estimation errors on the black hole's mass and spin. We estimate that more than 10^6 templates would be needed for a single-stage multi-mode search. Therefore, we recommend a "two stage" search to save on computational costs: single-mode templates can be used for detection, but multi-mode templates or Prony methods should be used to estimate parameters once a detection has been made. We update estimates of the critical signal-to-noise ratio required to test the hypothesis that two or more modes are present in the signal and to resolve their frequencies, showing that second-generation Earth-based detectors and LISA have the potential to perform no-hair tests.

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