标题： 从高度偏心致密双星中探测引力波 显示英文标题

标题： Detecting gravitational waves from highly eccentric compact binaries

摘要： 在致密恒星区域，黑洞和中子星的高偏心双星可以通过多种多体相互作用形成。 这样的双星在合并前可能会以一系列 largely isolated 的引力波爆发形式辐射出其结合能的显著部分。 考虑到预期的黑洞和中子星质量，许多这样的系统将在当代地面引力波探测器的灵敏频段内发出这些重复的爆发。 不幸的是，现有的引力波搜索方法不适合检测这些信号。 在本工作中，我们将“功率叠加”方法应用于高度偏心双星的引力波信号检测。 我们将这种方法作为 Q 变换的扩展来实现，Q 变换是对窗口复指数的多分辨率基的投影，之前已被用于分析 LIGO/Virgo 探测器网络的数据。 我们的方法在时间-频率块的集合上寻找过量功率。 我们通过在模拟探测器噪声中注入信号的蒙特卡罗实验来评估我们方法的性能。 我们的结果表明，功率叠加方法对偏心双星信号的灵敏度明显优于现有的局部爆发搜索方法。 显示英文摘要

摘要： In dense stellar regions, highly eccentric binaries of black holes and neutron stars can form through various n-body interactions. Such a binary could emit a significant fraction of its binding energy in a sequence of largely isolated gravitational wave bursts prior to merger. Given expected black hole and neutron star masses, many such systems will emit these repeated bursts at frequencies within the sensitive band of contemporary ground-based gravitational wave detectors. Unfortunately, existing gravitational wave searches are ill-suited to detect these signals. In this work, we adapt a "power stacking" method to the detection of gravitational wave signals from highly eccentric binaries. We implement this method as an extension of the Q-transform, a projection onto a multiresolution basis of windowed complex exponentials that has previously been used to analyze data from the network of LIGO/Virgo detectors. Our method searches for excess power over an ensemble of time-frequency tiles. We characterize the performance of our method using Monte Carlo experiments with signals injected in simulated detector noise. Our results indicate that the power stacking method achieves substantially better sensitivity to eccentric binary signals than existing localized burst searches.