Evolving high-mass-ratio binary black holes with discontinuous Galerkin methods

Next-generation gravitational-wave observatories will enable the detection of binary black hole systems with high mass ratios. Extracting science from these future observations will rely on waveform models trained on accurate numerical-relativity simulations. Generating initial data for these simulations requires a robust control scheme, which was recently implemented in the SpECTRE code. However, evolving such systems with sufficient accuracy poses significant computational challenges, such as resolving disparate length scales and efficiently balancing the computational load, which SpECTRE aims to address by using discontinuous Galerkin methods with adaptive mesh refinement and task-based parallelism. In this talk, we report on our progress in producing initial data and evolving such high-mass-ratio binary black holes.