The nonlinear gravitational-wave memory causes a time-varying but nonoscillatory correction to the gravitational-wave polarizations. It arises from gravitational waves that are sourced by gravitational waves. Previous considerations of the nonlinear memory effect have focused on quasicircular binaries. Here, I consider the nonlinear memory from Newtonian orbits with arbitrary eccentricity. Expressions for the waveform polarizations and spin-weighted spherical-harmonic modes are derived for elliptic, hyperbolic, parabolic, and radial orbits. In the hyperbolic, parabolic, and radial cases the nonlinear memory provides a 2.5 post-Newtonian (PN) correction to the leading-order waveforms. This is in contrast to the elliptical and quasicircular cases, where the nonlinear memory corrects the waveform at leading (0PN) order. This difference in PN order arises from the fact that the memory builds up over a short "scattering" time scale in the hyperbolic case, as opposed to a much longer radiation-reaction time scale in the elliptical case. The nonlinear memory corrections presented here complete our knowledge of the leading-order (Peters-Mathews) waveforms for elliptical orbits. These calculations are also relevant for binaries with quasicircular orbits in the present epoch which had, in the past, large eccentricities. Because the nonlinear memory depends sensitively on the past evolution of a binary, I discuss the effect of this early-time eccentricity on the value of the late-time memory in nearly circularized binaries. I also discuss the observability of large "memory jumps" in a binary's past that could arise from its formation in a capture process. Lastly, I provide estimates of the signal-to-noise ratio of the linear and nonlinear memories from hyperbolic and parabolic binaries.
International Centre for Theoretical Sciences, Tata Institute of Fundamental Research（国际理论科学中心，塔塔基础研究所）；CEICO, FZU-Institute of Physics of the Czech Academy of Sciences（捷克科学院物理研究所FZU-CEICO）
Eccentricity evolution of spinning binaries and its dependence on the equation of state of the components
Gran Sasso Science Institute (GSSI)（格兰萨索科学研究所）；INFN, Laboratori Nazionali del Gran Sasso（意大利国家核物理研究所，格兰萨索国家实验室）；Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut)（马克斯·普朗克引力物理学研究所（爱因斯坦研究所））；Leibniz Universität Hannover（汉诺威莱布尼茨大学）
Stochastic Gravitational Wave Background from Highly-Eccentric Stellar-Mass Binaries in the Milli-hertz Band
UCLA（加州大学洛杉矶分校）；Mani L. Bhaumik Institute for Theoretical Physics, Department of Physics and Astronomy, UCLA（加州大学洛杉矶分校物理与天文学系马尼·L·巴乌米克理论物理研究所）；Rudolf Peierls Centre for Theoretical Physics, Parks Road, Oxford（牛津大学鲁道夫·派尔斯理论物理中心）
On the ability of various circular inspiral templates to capture inspiral gravitational waves from compact binaries having tiny orbital eccentricities
我们探讨了各种类型的后牛顿（PN）精确的圆形模板捕捉inspiral引力波（GW）信号的能力，从紧凑的双星具有微小的轨道偏心率。GW信号通过适应T. Damour，A. Gopakumar和B. R. Iyer，[Phys.Rev.D70，064028（2004）]，采用轨道能量和时间偏心率来描述轨道演化。使用与初始LIGO相关的拟合因子估计，我们表明基于绝热TaylorT1，完全绝热TaylorT1和TaylorT4近似的圆形模板无法从具有微小剩余轨道偏心率的紧凑双星中捕获我们的GW信号。然而，基于最近引入的泰勒近似式的2PN阶圆形内旋模板被发现在从具有中等偏心率的内旋致密双星中捕获GW方面既有效又忠实，并且我们为我们的观察提供了物理解释。
Gravitational-wave amplitudes for compact binaries in eccentric orbits at the third post-Newtonian order: Tail contributions and post-adiabatic corrections
Pulsar timing array signals induced by black hole binaries in relativistic eccentric orbits
非圆轨道上的单个超大质量黑洞双星可能是快速成熟的脉冲星定时阵列实验的纳赫兹引力波源。我们发展了一种精确有效的方法来计算脉冲星定时阵列信号，由于引力波从吸入相对论偏心轨道的超大质量黑洞双星。我们的方法采用开普勒型参数解模型的第三后牛顿精确进动偏心轨道，而一个新的半解析处方提供了模型的四极阶引力波发射的影响。这些输入导致一个半解析的处方来模拟这样的信号，引起的非自旋黑洞二进制沿任意偏心率轨道螺旋。此外，我们提供了一个完整的分析处方模型脉冲星定时阵列信号从黑洞二进制沿适度偏心轨道吸气，Boetzelet等人的影响。[Phys. Rev. D 96，044011（2017）]。这些方法正在被纳入企业和TEMPO 2搜索脉冲星定时阵列数据集中存在这样的二进制文件。
Searching for gravitational-wave signals emitted by eccentric compact binaries using a non-eccentric template bank: implications for ground-based detectors
Gravitational waves from compact binaries inspiralling along post-Newtonian accurate eccentric orbits: Data analysis implications
沿偏心轨道旋转的致密双星是地基激光干涉仪的引力波源。我们探索的损失，在事件发生率时，从紧凑的二进制文件，沿着后牛顿精确偏心轨道与某些明显的非最佳搜索模板的灵感搜索GW。对于本分析，具有2.5后牛顿精确轨道演化的GW信号按照[T. Damour，A. Gopakumar和B. R. Iyer，Phys. Rev. \textbf{70}，064028（2004）]。我们证明了搜索模板，模型在规范不变的方式GWs从紧凑的二进制inspirling qudrupolar辐射反应下沿2 PN精确的圆形轨道是非常有效的捕捉我们有点现实的GW信号。然而，基于绝热、完全绝热和规范依赖的完全非绝热近似的三种类型的搜索模板在[P. Ajith，B. R.伊耶角A. K. Robinson和B. S. Sathyaprakash，%``A new class of post-Newtonian approximants to the dynamics of inspiralling compact binaries：Test-mass in the Schwarzschild spacetime，'' Phys. Rev. D { \bf 71}，044029（2005）]，与四极辐射反应下的圆形内旋相关，发现在捕获上述偏心信号方面效率低下。我们的结论是，将需要进一步的调查，以探测各种类型的PN准确的…
Extracting Astrophysical Information of Highly-Eccentric Binaries in the Millihertz Gravitational Wave Band
UCLA（加州大学洛杉矶分校）；Mani L. Bhaumik Institute for Theoretical Physics, Department of Physics and Astronomy, UCLA（加州大学洛杉矶分校物理与天文学系马尼·L·巴乌米克理论物理研究所）；LIGO Laboratory, California Institute of Technology（加州理工学院LIGO实验室）；Department of Physics, The Chinese University of Hong Kong（香港中文大学物理系）；RESCEU, The University of Tokyo（东京大学RESCEU）；Rudolf Peierls Centre for Theoretical Physics, Parks Road, Oxford（牛津大学鲁道夫·派尔斯理论物理中心）；Department of Physics and Astronomy, University of British Columbia（不列颠哥伦比亚大学物理与天文学系）；Department of Astronomy and Astrophysics, University of California, San Diego（加州大学圣地亚哥分校天文与天体物理学系）；Center for Computational Astrophysics, Flatiron Institute（西蒙斯基金会平顿研究所计算天体物理中心）
Full-analytic frequency-domain gravitational wave forms from eccentric compact binaries to 2PN accuracy
本文给出了任意质量比的偏心非自旋致密双星在时间傅立叶域中的全解析引力波（GW）形式。最近描述的半解析性质，即在数值上反演高阶开普勒方程但保持所有其他计算解析的要求，是第一次避免的。这篇文章是对之前一篇文章（Tessmer和Schäfer，Phys. Rev. D 82，124064（2010））的补充，在谐波GW振幅和保守轨道动力学方面达到了第二后牛顿（2PN）阶。给出了调和坐标系下开普勒方程的全解析反演公式，以及偏心距平三角函数关于平均距平正弦和余弦的解析时间傅里叶展开式。不考虑尾项。
Phasing of gravitational waves from inspiralling eccentric binaries at the third-and-a-half post-Newtonian order
我们得到了一个有效的描述非自旋的紧凑型双星的动力学在吸气偏心轨道，以实现在3.5后牛顿（PN）的顺序从这样的二进制的引力波的定相。我们的计算在很大程度上依赖于[T. Damour，A. Gopakumar和B. R. Iyer，Phys. Rev. D \textbf{70}，064028（2004）]，以及在[R.-R. M. Memmesheimer，A. Gopakumar和G. Schäfer，Phys. Rev. D \textbf{70}，104011（2004）]。如果地球上现有的和先进的引力波干涉仪计划从吸气偏心双星中寻找引力波，那么具有3.5PN精确定相的引力波极化$h_{+}$和$h_{\times}$将是有用的。我们的结果将需要做\emph{astrophysics}与拟议的空间为基础的GW干涉仪，如LISA，BBO，和DECIGO。
