标题： 针对旋进致密双星的引力波改进滤波器 显示英文标题

标题： Improved filters for gravitational waves from inspiralling compact binaries

摘要： 为了可靠且准确地从绕轨致密双星中提取完全的广义相对论引力波信号，探讨了所需的后牛顿展开阶数。 基于以下两个输入构造了一类近似波形，称为P近似器： (a) 引入了两个新的能量型和通量型函数e(v)和f(v)，分别；(b) 系统地使用Pade近似来构建e(v)和f(v)的连续近似器。 新的P近似器不仅比标准泰勒近似器更有效（更大的重叠）和更忠实（更小的偏差），而且收敛得更快且单调。 目前可用的O(v/c)^5精度的后牛顿结果可用于构建提供与精确波形重叠大于96.5%的P近似波形，这意味着在P近似器的帮助下，超过90%的潜在事件可以被探测到，而相比之下，仅使用标准后牛顿近似器时只能探测到10-15%。 显示英文摘要

摘要： The order of the post-Newtonian expansion needed, to extract in a reliable and accurate manner the fully general relativistic gravitational wave signal from inspiralling compact binaries, is explored. A class of approximate wave forms, called P-approximants, is constructed based on the following two inputs: (a) The introduction of two new energy-type and flux-type functions e(v) and f(v), respectively, (b) the systematic use of Pade approximation for constructing successive approximants of e(v) and f(v). The new P-approximants are not only more effectual (larger overlaps) and more faithful (smaller biases) than the standard Taylor approximants, but also converge faster and monotonically. The presently available O(v/c)^5-accurate post-Newtonian results can be used to construct P-approximate wave forms that provide overlaps with the exact wave form larger than 96.5% implying that more than 90% of potential events can be detected with the aid of P-approximants as opposed to a mere 10-15 % that would be detectable using standard post-Newtonian approximants.