Pith. sign in

REVIEW 3 cited by

The Event Horizon General Relativistic Magnetohydrodynamic Code Comparison Project

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 1904.04923 v2 pith:4C5EENT2 submitted 2019-04-09 astro-ph.HE gr-qc

Oliver Porth , Koushik Chatterjee , Ramesh Narayan , Charles F. Gammie , Yosuke Mizuno , Peter Anninos , John G. Baker , Matteo Bugli
show 20 more authors
Chi-kwan Chan Jordy Davelaar Luca Del Zanna Zachariah B. Etienne P. Chris Fragile Bernard J. Kelly Matthew Liska Sera Markoff Jonathan C. McKinney Bhupendra Mishra Scott C. Noble Héctor Olivares Ben Prather Luciano Rezzolla Benjamin R. Ryan James M. Stone Niccolò Tomei Christopher J. White Ziri Younsi The Event Horizon Telescope Collaboration
This is my paper · ORCID
classification astro-ph.HEgr-qc
keywords grmhdcodeseventhorizoncodegeneralrelativisticaccretion
verification ladder T0 review T1 audit T2 compute T3 formal
0 comments
read the original abstract

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 (EHT) 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 between 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.

Discussion (0). Continue with ORCID to comment.

Forward citations

Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Dark matter environments and safeguards for spacetime inference from horizon scale interferometry

    gr-qc 2026-07 conditional novelty 6.0 of 10

    Using public 2017 M87* closure data, a frozen Kerr source fails an absolute adequacy test and the differential tidal-charge response fails numerical convergence, so no posterior or bound is reported.

  2. Probing radiation micro-physics in M 87 I. Total intensity and broad-band spectra

    astro-ph.HE 2026-07 conditional novelty 5.0 of 10

    Future VLBI with dynamic range 10^4 from 86–345 GHz can distinguish turbulent vs reconnection electron heating and thermal vs kappa distributions in M87 via spectral indices and jet structure.

  3. A general relativistic hydrodynamic simulation code for studying advective, sub-Keplerian accretion flow onto black holes

    astro-ph.IM 2025-06 conditional novelty 4.0 of 10

    A GRHD finite-volume code is validated against analytic transonic solutions and applied to 2D sub-Keplerian accretion, recovering shocks and frame-dragging effects.

Pith tools