A Hybridized Surrogate Model using CCE Waveforms

With recent improvements in the Cauchy-characteristic evolution (CCE) procedure, CCE waveforms could become the new standard method of extracting gravitational waveforms at $mathcal{I}^+$ from numerical relativity simulations. Unlike the waveforms extracted using the extrapolation method, CCE waveforms capture memory effects expected to be observed using next-generation detectors. We present a new surrogate model built with CCE waveforms, NRSur3dq8\_CCE. This model is trained over the same 3-dimensional parameter space as the previous model NRSur3dq8, but now using CCE waveforms: $q leq 8 ext{ and } vertchi_{1z}vert,~ vertchi_{2z}vert leq 0.8$