http://arxiv.org/abs/1906.00913
To obtain gravitational waveforms, results of analytical approximations for the early phase of compact binary coalescences (CBCs) are `stitched’ with –or calibrated against– numerical simulations for the late phase. Each of these calculations requires external inputs and there are additional ambiguities associated with the stitching procedure. Nonetheless, the resulting waveforms have been invaluable for the initial detections by the LIGO-Virgo collaboration. We are now entering an era of abundant detections, requiring greater theoretical precision both for testing general relativity and for estimating source parameters assuming general relativity (GR). The goal of this paper is to show that full non-linear GR imposes an infinite number of sharp constraints on the CBC waveforms which can be used as clear-cut measures (i) to evaluate the accuracy of any waveform in the template bank against exact GR, and (ii) to discriminate between various choices that have to be made to resolve the ambiguities.
A. Ashtekar, T. Lorenzo and N. Khera
Wed, 5 Jun 19
54/74
Comments: 23 pages, 1 figure