Gravitational waves from eccentric compact binaries: Reduction in signal-to-noise ratio due to nonoptimal signal processing
Gravitational waves from eccentric compact binaries: Reduction in signal-to-noise ratio due to nonoptimal signal processing
复制标题
来自偏心致密双星的引力波：由于非最佳信号处理导致信噪比降低
DOI：
10.1103/physrevd.60.124008
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发表时间：
1999
影响因子：
5
通讯作者：
E. Poisson
中科院分区：
文献类型：
--
作者：
K. Martel;E. Poisson
吸气致密双星已被认为是最有前途的干涉探测器引力波来源之一。当引力波进入仪器的频段时，这些双星中的大多数预计都已经循环了。然而，不排除某些二进制文件可能仍然具有显著偏心率的可能性。我们设想这样一种情况，其中检测器接收到偏心信号，但没有在数据分析中显式地搜索，数据分析完全使用环形波形作为匹配滤波器。我们确定了这些滤波器虽然不是最优的，但仍能成功捕获偏心信号的可能性。我们通过计算在使用这些非最优滤波器搜索偏心信号时产生的信噪比损失来实现这一点。我们发现，对于给定总质量的双星系统，这种损失随着偏心率的增加而增加。我们还表明，对于给定的偏心率，损失随着总质量的增加而减小。
Inspiraling compact binaries have been identified as one of the most promising sources of gravitational waves for interferometric detectors. Most of these binaries are expected to have circularized by the time their gravitational waves enter the instrument's frequency band. However, the possibility that some of the binaries might still possess a significant eccentricity is not excluded. We imagine a situation in which eccentric signals are received by the detector but not explicitly searched for in the data analysis, which uses exclusively circular waveforms as matched filters. We ascertain the likelihood that these filters, though not optimal, will nevertheless be successful at capturing the eccentric signals. We do this by computing the loss in signal-to-noise ratio incurred when searching for eccentric signals with those nonoptimal filters. We show that for a binary system of a given total mass, this loss increases with increasing eccentricity. We show also that for a given eccentricity, the loss decreases as the total mass is increased.