Iharm3D: Vectorized General Relativistic Magnetohydrodynamics

Abstract

Iharm3D is an open-source C code for simulating black hole accretion systems in arbitrary stationary spacetimes using ideal general-relativistic magnetohydrodynamics (GRMHD). It is an implementation of the HARM ("High Accuracy Relativistic Magnetohydrodynamics") algorithm outlined in Gammie et al. (2003) with updates as outlined in McKinney & Gammie (2004) and Noble et al. (2006). The code is most directly derived from Ryan et al. (2015) but with radiative transfer portions removed. HARM is a conservative finite-volume scheme for solving the equations of ideal GRMHD, a hyperbolic system of partial differential equations, on a logically Cartesian mesh in arbitrary coordinates.

arXiv comment4 pages, 2 figures. Associated code at https://github.com/AFD-Illinois/iharm3d

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• Probing Plasma Physics with Spectral Index Maps of Accreting Black Holes on Event Horizon Scales
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• Effects of Hydrogen vs. Helium on Electromagnetic Black Hole Observables
• Photon ring polarimetry with next-generation black hole imaging I. M87*
• Deep learning inference with the Event Horizon Telescope II. The Zingularity framework for Bayesian artificial neural networks
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• $\text{GPUmonty}$: A GPU-accelerated relativistic Monte Carlo radiative transfer code
• PATOKA: Simulating Electromagnetic Observables of Black Hole Accretion
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• Photon Ring Symmetries in Simulated Linear Polarization Images of Messier 87*