Porth, O;
Chatterjee, K;
Narayan, R;
Gammie, CF;
Mizuno, Y;
Anninos, P;
Baker, JG;
... Zhu, Z; + view all
(2019)
The Event Horizon General Relativistic Magnetohydrodynamic Code Comparison Project.
Astrophysical Journal: Supplement Series
, 243
, Article 26. 10.3847/1538-4365/ab29fd.
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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.
| Type: | Article |
|---|---|
| Title: | The Event Horizon General Relativistic Magnetohydrodynamic Code Comparison Project |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3847/1538-4365/ab29fd |
| Publisher version: | https://doi.org/10.3847/1538-4365/ab29fd |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Astronomy & Astrophysics, 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 |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10080622 |
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