The Event Horizon General Relativistic Magnetohydrodynamic Code Comparison Project

By Oliver Porth, K. Chatterjee, Ramesh Narayan, Charles F. Gammie, Yosuke Mizuno, Peter Anninos, John G. Baker, M. Bugli, Chi-kwan Chan, J. Davelaar and 208 more. Astrophysical Journal Supplement Series, 2019

278 citations recorded by the source corpus.

Recent developments in compact object astrophysics, especially the discovery of merging neutron stars by LIGO, the imaging of the black hole in M87 by the Event Horizon Telescope, and high- precision astrometry of the Galactic Center at close to the event horizon scale by the GRAVITY experiment motivate the development of numerical source models that solve the equations of general relativistic magnetohydrodynamics (GRMHD). Here we compare GRMHD solutions for the evolution of a magnetized accretion flow where turbulence is promoted by the magnetorotational instability from a set of nine GRMHD codes: Athena++, BHAC, Cosmos++, ECHO, H-AMR, iharm3D, HARM-Noble, IllinoisGRMHD, and KORAL. Agreement among the codes improves as resolution increases, as measured by a consistently applied, specially developed set of code performance metrics. We conclude that the community of GRMHD codes is mature, capable, and consistent on these test problems.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/04ffad3891bf4638d56d0a2439bc0877eb18ef74

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In Astronomy and Astrophysics

Citations in the corpus

Magnetic Reconnection and Hot Spot Formation in Black Hole Accretion Disks (2020, methodology): “L69 Narayan, R., Sadowski, A., Penna, R. F., & Kulkarni, A. K. 2012, Monthly Notices of the Royal Astronomical Society, 426, 3241, doi: 10.1111/j.1365-2966.2012.22002.x Nathanail, A., Fromm, C. M., Porth, O., et al. 2020, Plasmoid formation in global GRMHD simulations and AGN flares. https://arxiv.o”
The Athena++ Adaptive Mesh Refinement Framework: Design and Magnetohydrodynamic Solvers (2020, methodology): “The evolution of accretion flows such as this, at similar resolutions, is ubiquitous in the black hole modeling community, and it is used as a test of codes’ GRMHD capabilities (see Porth et al. 2019, including a comparison of Athena++ with other codes).”
First Sagittarius A* Event Horizon Telescope Results. V. Testing Astrophysical Models of the Galactic Center Black Hole (2022, methodology): “…magnetohydrodynamics (GRMHD) simulations (e.g., Hawley 2000; De Villiers & Hawley 2003; Gammie et al. 2003; Giacomazzo & Rezzolla 2007; Fragile et al. 2012, 2014; White et al. 2016; Anninos et al. 2017; Olivares Sánchez et al. 2018; Olivares et al. 2019; Porth et al. 2019; Liska et al. 2019).”