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arXiv 1302.6953gr-qc
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二元黑洞并合的模板模层次

Template Mode Hierarchies for Binary Black Hole Mergers

James Healy, Pablo Laguna, Larne Pekowsky, Deirdre Shoemaker

摘要:

匹配滤波是一种流行的数据分析框架,用于搜索由致密天体双星发射的引力波信号。在匹配滤波搜索中使用的模板主要由四极模式构造,因为该模式是能量上最占主导地位的信道。然而,对于高度进动的双星或具有适度大质量比的双星,高阶模式也具有显着的功率。我们调查如何在模板中包含更高的模式增加探测引力波的前景。具体来说,我们使用数值相对论波形从晚inspiral和合并的二进制黑洞,以确定模式的层次结构,覆盖天空的二进制方向。我们表明,在这些层次结构中的顺序取决于二进制系统和模式强度的特性。我们的研究表明,检测适度高进动或不平等的质量二进制需要包括更高的模式在模板银行。

英文摘要:

Matched filtering is a popular data analysis framework used to search for gravitational wave signals emitted by compact object binaries. The templates used in matched filtering searches are constructed predominantly from the quadrupolar mode because this mode is the energetically most dominant channel. However, for highly precessing binaries or binaries with moderately large mass ratios, significant power is also carried by higher-order modes. We investigate how the inclusion of higher modes in the templates increases the prospects for detecting gravitational waves. Specifically, we use numerical relativity waveforms from the late inspiral and coalescence of binary black holes to identify mode hierarchies that cover the sky of binary orientations. We show that the ordering in these hierarchies depends on the characteristics of the binary system and the mode strengths. Our study demonstrates that detecting moderately high precessing or unequal mass binaries requires the inclusion of higher modes in the templates banks.

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