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Paper: Global Magnetohydrodynamic Simulations of Flares: Outflows and Time Variabilities in Black Hole Accretion Flows
Volume: 402, Approaching Micro-Arcsecond Resolution with VSOP-2: Astrophysics and Technologies
Page: 317
Authors: Matsumoto, R.; Machida, M.
Abstract: We carried out global three-dimensional resistive magnetohydrodynamic simulations of radiatively inefficient black hole accretion flows. The disk magnetic fields, amplified by MRI, create magnetic loops emerging from the disk. Subsequently, these loops are twisted by the differential rotation of the disk and form large-scale poloidal magnetic fields even when the initial magnetic field is purely azimuthal. Semi-relativistic outflows emerge along the large-scale poloidal magnetic fields. By analyzing the simulation results, we obtained 43 GHz image of the launching region of outflows. We also discuss the possibility of detecting dynamo-driven reversals of mean magnetic fields.
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