General Relativistic Magnetohydrodynamic Simulations of Accreting Tori: Resolution Study

2024/03/24 by Angelos Karakonstantakis, Karakonstantakis, Angelos, Debora Lančová +4 · 1 citation
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE) #Magnetic confinement fusion research #Solar and Space Plasma Dynamics #Superconducting Materials and Applications

paper · pdf · doi:10.48550/arxiv.2403.16236

openalex publication_date 2024/03/24 · openalex created_date 2024/03/27 · openalex updated_date 2026/07/28

Abstract

We present two-dimensional general relativistic radiative magnetohydrodynamical simulations of accretion disks around non-rotating stellar-mass black hole. We study the evolution of an equilibrium accreting torus in different grid resolutions to determine an adequate resolution to produce a stable turbulent disk driven by magneto-rotational instability. We evaluate the quality parameter, Q_θ, from the ratio of MRI wavelength to the grid zone size and examine the effect of resolution in various quantitative values such as the accretion rate, magnetisation, fluxes of physical quantities and disk scale-height. We also analyse how the resolution affects the formation of plasmoids produced in the magnetic reconnection events.

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