AN EXTENSION of the ATHENA++ CODE FRAMEWORK for GRMHD BASED on ADVANCED RIEMANN SOLVERS and STAGGERED-MESH CONSTRAINED TRANSPORT

Christopher J. White, James McLellan Stone, Charles F. Gammie

Research output: Contribution to journalArticle

66 Scopus citations

Abstract

We present a new general relativistic magnetohydrodynamics (GRMHD) code integrated into the Athena++ framework. Improving upon the techniques used in most GRMHD codes, ours allows the use of advanced, less diffusive Riemann solvers, in particular HLLC and HLLD. We also employ a staggered-mesh constrained transport algorithm suited for curvilinear coordinate systems in order to maintain the divergence-free constraint of the magnetic field. Our code is designed to work with arbitrary stationary spacetimes in one, two, or three dimensions, and we demonstrate its reliability through a number of tests. We also report on its promising performance and scalability.

Original languageEnglish (US)
Article number22
JournalAstrophysical Journal, Supplement Series
Volume225
Issue number2
DOIs
StatePublished - Aug 2016

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • accretion, accretion disks
  • black hole physics
  • magnetohydrodynamics (MHD)
  • relativistic processes

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