2024/09/30 by Geoffrey Lovelace, Kyle C. Nelli, Nils Deppe +37 · 1 voice · 7 citations
Physics and Astronomy · Mathematics · #Pulsars and Gravitational Waves Research #Astrophysical Phenomena and Observations #Numerical methods for differential equations
paper · pdf · doi:10.1088/1361-6382/ad9f19
Abstract Binary black holes are the most abundant source of gravitational-wave observations. Gravitational-wave observatories in the next decade will require tremendous increases in the accuracy of numerical waveforms modeling binary black holes, compared to today’s state of the art. One approach to achieving the required accuracy is using spectral-type methods that scale to many processors. Using the SpECTRE numerical-relativity (NR) code, we present the first simulations of a binary black hole inspiral, merger, and ringdown using discontinuous Galerkin (DG) methods. The efficiency of DG methods allows us to evolve the binary through ∼ 18 orbits at reasonable computational cost. We then use SpECTRE ’s Cauchy Characteristic Evolution (CCE) code to extract the gravitational waves at future null infinity. The open-source nature of SpECTRE means this is the first time a spectral-type method for simulating binary black hole evolutions is available to the entire NR community.