论文标题

快速频域有效的飞行波形

Fast Frequency-Domain Effective Fly-By Waveforms

论文作者

Loutrel, Nicholas

论文摘要

最近,我们开发了有效的飞行(EFB)波形,旨在模拟高度偏心二进制的重力辐射爆发。我们在这里提出了一个更快的评估频域EFB波形的速度。波形是通过使用高几幅功能的渐近扩展来构建的。由于波形是完全分析的,因此我们研究了可以使用Fisher分析来测量二进制参数的准确性。我们发现,参数之间存在归化性,因此波形是根据chirp质量$ {\ cal {m}} $和曲率$ {\ cal {p}} $的轨道半径的参数,而不是总质量,对称的质量比和半拉图斯的总质量,半拉)。通过计算来自两千个二进制系统的单次突发的Fisher矩阵,我们发现大多数系统在CHIRP质量,光度距离和倾斜角的不确定性将超过百分之一百,而大约一半的轨道曲率半径不确定性的不确定性不到百分之一百分之一百。此外,我们重复此分析后在灵感序列内包含其他突发后,发现波形参数中的不确定性可以通过数量级来改善脉冲模型。

Recently, we developed effective fly-by (EFB) waveforms designed to model the burst of gravitational radiation from highly eccentric binaries. We here present a faster to evaluate frequency domain EFB waveform. The waveform is constructed through the use of asymptotic expansions of hypergeometric functions. Since the waveform is fully analytic, we study the accuracy to which the binary's parameters can be measured using a Fisher analysis. We find that degeneracies exist among the parameters, such that the waveform is parameterized in terms of the chirp mass ${\cal{M}}$ and orbital radius of curvature ${\cal{P}}$, instead of the total mass, symmetric mass ratio, and semi-latus rectum of the binary. By computing the Fisher matrix for single bursts from two thousand binary systems, we find that most of the systems will have greater than one hundred percent uncertainty in the chirp mass, luminosity distance, and inclination angle, while roughly half will have less than one hundred percent uncertainty in the orbital radius of curvature, orbital eccentricity, and polarization angle. Further, we repeat this analysis after including additional bursts within the inspiral sequence and find that the uncertainties in the waveform's parameters can improve by orders of magnitude with a sufficient timing model for the bursts.

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