The Event Horizon General Relativistic Magnetohydrodynamic Code Comparison Project

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  • Universidad de Concepción
  • University of Amsterdam
  • Goethe University Frankfurt
  • Harvard-Smithsonian Center for Astrophysics
  • Harvard University
  • University of Illinois
  • Lawrence Livermore National Laboratory
  • NASA Goddard Space Flight Center
  • University of Maryland
  • Université Paris Diderot
  • University of Arizona
  • Radboud University Nijmegen
  • University of Florence
  • INAF - Osservatorio Astrofisico di Arcetri
  • West Virginia University
  • College of Charleston
  • H2O.ai
  • University of Colorado Denver
  • University of Tulsa
  • Los Alamos National Laboratory
  • Princeton University
  • University College London
  • National Radio Astronomy Observatory
  • Massachusetts Institute of Technology
  • National Astronomical Observatory of Japan
  • Instituto de Astrofisica de Andalucia (Spain)
  • Max-Planck-Institut für Radioastronomie
  • Academia Sinica - Institute of Astronomy and Astrophysics
  • Universitat de València
  • East Asian Observatory
  • Universiteit Leiden
  • California Institute of Technology
  • Université Grenoble Alpes
  • Perimeter Institute for Theoretical Physics
  • University of Waterloo
  • Korea Astronomy and Space Science Institute
  • University of Science and Technology UST
  • University of Chicago
  • Cornell University
  • Chinese Academy of Sciences
  • Chalmers Tekniska högskola
  • The Graduate University for Advanced Studies SOKENDAI
  • University of Naples Federico II
  • University of Pretoria
  • Rhodes University
  • University of Groningen
  • Peking university
  • Instituto Nacional de Astrofísica, Óptica y Electrónica
  • The Institute of Statistical Mathematics
  • University of Tokyo
  • Boston University
  • Saint-Petersburg University
  • The Joint Institute for VLBI ERIC
  • Kogakuin University of Technology and Engineering
  • National Sun Yat-sen University
  • National Optical Astronomy Observatory
  • Nanjing University
  • INAF Istituto di Radioastronomia
  • National Taiwan University
  • Universidad Nacional Autonoma de Mexico
  • Observatorio de Yebes
  • University of California at Santa Barbara
  • University of Massachusetts
  • University of Toronto
  • University of California
  • Instituto de Radioastronomía Milimétrica (IRAM)
  • Consejo Nacional de Ciencia y Tecnologia Mexico
  • Hiroshima University
  • Yonsei university
  • Netherlands Organisation for Scientific Research (NWO)
  • Tohoku University
  • Seoul National University
  • Brandeis University
  • Huazhong University of Science and Technology
  • University of Science and Technology of China

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, 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.

Details

Original languageEnglish
Article number26
Number of pages40
JournalAstrophysical Journal Supplement Series
Volume243
Issue number2
Publication statusPublished - Aug 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • black hole physics, magnetic fields, magnetohydrodynamics (MHD), methods: numerical, relativistic processes, BLACK-HOLE ACCRETION, ADVECTION-DOMINATED ACCRETION, SGR A-ASTERISK, GODUNOV-TYPE SCHEMES, MAGNETOROTATIONAL INSTABILITY, MAGNETIZED ACCRETION, EDDINGTON ACCRETION, GLOBAL SIMULATIONS, NUMERICAL SCHEME, NEUTRON-STARS

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