Compact binary coalescences: constraints on waveforms
Compact binary coalescences: constraints on waveforms
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DOI：
10.1007/s10714-020-02764-1
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发表时间：
2019-06
影响因子：
2.8
通讯作者：
A. Ashtekar;T. De Lorenzo;N. Khera
中科院分区：
文献类型：
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作者：
A. Ashtekar;T. De Lorenzo;N. Khera
紧凑的二元聚结（CBCs）的引力波形对于LIGO-Virgo合作的探测是非常宝贵的。它们是通过半解析模型和数值模拟相结合得到的。到目前为止，由这些程序引起的系统误差似乎小于统计误差。然而，将在不久的将来投入使用的新探测器的灵敏度大大提高，这将要求波形更加准确。这项任务将是方便的，如果一个有各种各样的交叉检查，以evaluateaccuracy，特别是在该地区的参数空间的数值模拟稀疏。目前，通过将候选波形与被认为是精确的数值相关性（NR）波形进行比较来估计误差。本文的目标是提出一个质的不同的工具。我们表明，充分的非线性广义相对论（GR）的CBC波形施加了无限数量的尖锐的约束。这些可以提供明确的措施来评估候选波形相对于精确GR的准确性，帮助发现系统误差，并提供对NR模拟本身的外部检查。
Gravitational waveforms for compact binary coalescences (CBCs) have been invaluable for detections by the LIGO-Virgo collaboration. They are obtained by a combination of semi-analytical models and numerical simulations. So far systematic errors arising from these procedures appear to be less than statistical ones. However, the significantly enhanced sensitivity of the new detectors that will become operational in the near future will require waveforms to be much more accurate. This task would be facilitated if one has a variety of cross-checks toevaluateaccuracy, particularly in the regions of parameter space where numerical simulations are sparse. Currently errors are estimated by comparing the candidate waveforms with the numerical relativity (NR) ones, which are taken to be exact. The goal of this paper is to propose a qualitatively different tool. We show that full non-linear general relativity (GR) imposes an infinite number of sharp constraints on the CBC waveforms. These can provide clear-cut measures to evaluate the accuracy of candidate waveforms against exact GR, help find systematic errors, and also provide external checks on NR simulations themselves.