The Event Horizon General Relativistic Magnetohydrodynamic Code Comparison Project

The Event Horizon General Relativistic Magnetohydrodynamic Code Comparison Project
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事件视界广义相对论磁流体动力学代码比较项目

DOI:
10.3847/1538-4365/ab29fd
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发表时间:
2019-04
期刊:
Astrophysical Journal, The - Supplement Series
影响因子:
--
通讯作者:
McKinney
McKinney
中科院分区:
其他
文献类型:
--
作者:
Porth Oliver;Chatterjee Koushik;Narayan Ramesh;Gammie Charles F.;Mizuno Yosuke;Anninos Peter;Baker John G.;Bugli Matteo;Chan Chi-kwan;Davelaar Jordy;Del Zanna Luca;Etienne Zachariah B.;Fragile P. Chris;Kelly Bernard J.;Liska Matthew;Markoff Sera;McKinney

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致密天体物理学的最新发展,特别是LIGO发现合并中子星、事件视界望远镜对M87中黑洞的成像以及引力实验在接近事件视界尺度的银河中心高精度天体测量,推动了求解广义相对论磁流体动力学(GRMHD)方程的数值源模型的发展。在这里,我们比较磁化吸积流演化的 GRMHD 解决方案,其中由九个 GRMHD 代码组的磁旋转不稳定性促进湍流:Athena++、BHAC、Cosmos++、ECHO、H-AMR、iharm3D、HARM-Noble、IllinoisGRMHD 和 KORAL。通过一致应用、专门开发的一组代码性能指标来衡量,代码之间的一致性随着分辨率的提高而提高。我们得出的结论是,GRMHD 代码社区在这些测试问题上是成熟、有能力且一致的。
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.
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