TAPIR Seminar

Performance-Portable Numerical Relativity with AthenaK and Applications

Hengrui Zhu, Graduate Student, Department of Physics, Princeton University,

In person: 370 Cahill. To Join via Zoom: 864 8902 5566

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ABSTRACT: In this talk, I introduce the numerical relativity module within AthenaK, an open-source, performance-portable astrophysics code designed for exascale computing. Motivated by the need for high-fidelity gravitational waveforms and the challenges of scaling to next-generation hardware, AthenaK employs the Z4c formulation to solve the Einstein equations. We validate its precision through standard tests, including the convergence of gravitational waveforms from binary black hole coalescences. Furthermore, we present preliminary results on a gauge invariant comparison with SpECTRE on binary black hole evolution. Lastly, we discuss initial findings on ultra-relativistic black hole collisions.

Event Sponsors:

Theoretical AstroPhysics Including Relativity and Cosmology (TAPIR) - More events from this Sponsor

For more information, please contact JoAnn Boyd by phone at 626-395-4280 or by email at joann@caltech.edu.