论文标题

二进制灵感中紧凑物体进化的有效现场理论

Effective field theory for compact object evolution in binary inspirals

论文作者

Martinez, Irvin, Weltman, Amanda

论文摘要

使用有效的现场理论框架进行扩展对象,我们描述了在跌落和合并之前,在二进制聚集的晚期灵感中旋转紧凑的物体的演变,包括由于旋转,潮汐,浪费,耗散和重力波辐射而引起的领先顺序校正。我们的实现与用重力波观测探测紧凑物体的恒星结构特别相关。有效场理论框架中的旋转紧凑型物体被描述为一个旋转点粒子,其有限尺寸效应在有效的动作中用高阶操作员编码,具有封装恒星内部结构的系数的操作员。对于通过非权威主义一般相对论描述的灵感方案,可以以图形方法(包括重力辐射效应)来获得对动作的每个项的纽顿后校正。考虑到有效理论的上述成分,我们使用算法进行点粒子模拟来求解二进制系统的动力学。我们提取引力波作为轨道频率的函数,该输入是在数值上生成的,然后在波形的分析函数中进行了评估。通过对已经检测到的Ligo-Virgo观测器进行说明性的数值实验,我们显示了恒星结构及其系数在波形相位演变中的作用,以及它们出现的顺序以及它们所需的敏感性,即引力波观测观测值才能测量它们。如果要测量这些系数,则可以对基本物理的严格限制。

Using the effective field theory framework for extended objects we describe the evolution of spinning compact objects in the late inspiral of the coalescence of a binary, before the plunge and merger, by including leading order corrections due to spin, tides, dissipation and gravitational wave radiation. Our implementation is of particular relevance for probing the stellar structure of compact objects with gravitational wave observations. A spinning compact object in the effective field theory framework is described as a spinning point particle, with its finite size effects encoded in higher order operators in the effective action, operators which have coefficients that encapsulates the internal structure of the star. For the inspiral regime described by non-relativistic general relativity, post-Newtonian corrections to each term of the action can be obtained in a diagrammatic approach, including gravitational radiation effects. Taking into account the aforementioned ingredients of the effective theory, we solve for the dynamics of the inspiral of binary systems using an algorithm for point particle simulations. We extract the gravitational wave as a function of the orbital frequency, input that is generated numerically and then evaluated in the analytic function of the waveform. By performing illustrative numerical experiments of systems that the LIGO-Virgo observatories have already detected, we show the role of the stellar structure and its coefficients in the phase evolution of the waveform, as well as the order in which they arise and the sensitivity required for the gravitational wave observatories to measure them. If these coefficients are to be measured, tight constraints on fundamental physics can be placed.

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