Princeton University Astroplasmas Seminar

The EHT Collaboration (EHTC) has now published high resolution images of total and polarized emission from the black hole M87. The interpretation of these and forthcoming images by the EHTC makes heavy use of libraries of simulations modeling the observed systems, conducted using general relativistic magnetohydrodynamics (GRMHD) and imaged via general relativistic radiative transfer (GRRT). While the imaging process is well-understood, there is a clear need for a broader array of longer GRMHD simulations as observational data accumulates. I will present a new performance-portable GRMHD code designed to address this need, KHARMA (Kokkos-based High-Accuracy Relativistic Magnetohydrodynamics, soon to have Adaptive mesh refinement). KHARMA leverages the Kokkos performance portability library to generate efficient code for different computer architectures, and uses the new Parthenon Eulerian simulation framework for many other code functions, keeping KHARMA simple while also fast, featureful, and extensible. I will end by presenting some future projects making use of this new capability.