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GR: Fachverband Gravitation und Relativitätstheorie

GR 13: Numerical Relativity

GR 13.1: Vortrag

Donnerstag, 24. März 2022, 14:00–14:20, GR-H2

GRHD simulations with GR-Athena++ — •William Cook — Theoretisch-Physikalisches Institut, Friedrich-Schiller Universitat Jena, 07743, Jena, Germany

For the first time we demonstrate the performance of the code GR-Athena++ in evolving general relativistic hydrodynamics (GRHD) in a dynamically evolving spacetime. GR-Athena++ utilises the task-based parallelism and block based adaptive mesh refinement of the Athena++ code, as well as its approach to solving GRHD problems in stationary spacetimes; combined with new functionality to solve the Einstein equations in the Z4c formulation. We demonstrate the performance of this new code by simulating the evolution of Neutron Stars in GR-Athena++, removing the Cowling approximation assumed in previous work, presenting a fully dynamical spacetime evolution.