Tilted Disks around Black Holes: A Numerical Parameter Survey for Spin and Inclination Angle

Abstract

We conduct a systematic study of the properties of tilted accretion flows around spinning black holes, covering a range of tilt angles and black hole spins, using the general-relativistic magnetohydrodynamics code Athena++. The same initial magnetized torus is evolved around black holes with spins ranging from 0 to 0.9, with inclinations ranging from 0 degrees to 24 degrees. The tilted disks quickly reach a warped and twisted shape that rigidly precesses about the black hole spin axis with deformations in shape large enough to hinder the application of linear bending wave theory. Magnetized polar outflows form, oriented along the disk rotation axes. At sufficiently high inclinations a pair of standing shocks develops in the disks. These shocks dramatically affect the flow at small radii, driving angular momentum transport. At high spins they redirect material more effectively than they heat it, reducing the dissipation rate relative to the mass accretion rate and lowering the radiative efficiency of the flow.

arXiv comment20 pages, 14 figures, to be published in ApJ

References in corpus (23)

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• A parameter survey of Sgr A* radiative models from GRMHD simulations with self-consistent electron heating
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• Radiation Transport Two-Temperature GRMHD Simulations of Warped Accretion Disks
• GRMHD Simulations and Modeling for Jet Formation and Acceleration Region in AGNs
• The Effects of Tilt on the Images of Black Hole Accretion Flows
• Effect of geometrically thin discs on precessing, thick flows: Relevance to type-C QPOs
• Magnetic Flux Transport in Radiatively Inefficient Accretion Flows and the Pathway towards a Magnetically Arrested Disk
• Accretion Flow Morphology in Numerical Simulations of Black Holes from the ngEHT Model Library: The Impact of Radiation Physics
• On the dynamics of low-viscosity warped discs around black holes
• A Phase Lag between Disk and Corona in GRMHD Simulations of Precessing Tilted Accretion Disks
• Survey of Radiative, Two-Temperature Magnetically Arrested Simulations of the Black Hole M87* I: Turbulent Electron Heating
• Misaligned magnetized accretion flows onto spinning black holes: Magneto-spin alignment, outflow power, and intermittent jets
• Energy Extraction from a Black Hole by a Strongly Magnetized Thin Accretion Disk
• Tilted Circular Orbits around a Kerr Black Hole
• The Luminous, Hard State Can't Be MAD
• The Effects of Tilt on the Time Variability of Millimeter and Infrared Emission from Sagittarius A*
• Deep learning inference with the Event Horizon Telescope II. The Zingularity framework for Bayesian artificial neural networks
• Electron Heating in the Trans-Relativistic Perpendicular Shocks of Tilted Accretion Flows
• Extreme scale height variations and nozzle shocks in warped disks
• Shock-induced partial alignment in geometrically-thick tilted accretion disks around black holes
• Tilted Accretion Disks
• PATOKA: Simulating Electromagnetic Observables of Black Hole Accretion
• Multimessenger Signatures of Tilted, Self-Gravitating, Black Hole Disks