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arXiv 1005.3306gr-qc
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匹配后牛顿和数值相对论波形:非旋进黑洞双星的系统误差和新的唯象模型

Matching post-Newtonian and numerical relativity waveforms: systematic errors and a new phenomenological model for non-precessing black hole binaries

L. Santamaria, F. Ohme, P. Ajith, B. Bruegmann, N. Dorband, M. Hannam, S. Husa, P. Moesta, D. Pollney, C. Reisswig, E. L. Robinson, J. Seiler, B. Krishnan

摘要:

提出了一个新的非旋进自旋黑洞双星的旋进和并合唯象引力波形模型。我们的方法是基于后牛顿inspiral波形与基于数值相对论的二元黑洞合并波形的频域匹配。我们量化的各种可能的来源,出现在匹配后牛顿和数值相对论波形的系统误差,我们使用的匹配标准的基础上尽量减少这些错误,我们发现,主要的错误来源是那些在合并附近的后牛顿波形。给出了非进动黑洞双星引力辐射主模的解析公式,该公式描述了混合波形的现象。在当前的引力波搜索中实施它应该允许交叉检查其他吸气合并振铃波形族,并提高引力波搜索的范围。

英文摘要:

We present a new phenomenological gravitational waveform model for the inspiral and coalescence of non-precessing spinning black hole binaries. Our approach is based on a frequency domain matching of post-Newtonian inspiral waveforms with numerical relativity based binary black hole coalescence waveforms. We quantify the various possible sources of systematic errors that arise in matching post-Newtonian and numerical relativity waveforms, and we use a matching criteria based on minimizing these errors; we find that the dominant source of errors are those in the post-Newtonian waveforms near the merger. An analytical formula for the dominant mode of the gravitational radiation of non-precessing black hole binaries is presented that captures the phenomenology of the hybrid waveforms. Its implementation in the current searches for gravitational waves should allow cross-checks of other inspiral-merger-ringdown waveform families and improve the reach of gravitational wave searches.

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