Three-dimensional MHD Simulations of Radiatively Inefficient Accretion Flows

Abstract

We present three-dimensional MHD simulations of rotating radiatively inefficient accretion flows onto black holes. In the simulations, we continuously inject magnetized matter into the computational domain near the outer boundary, and we run the calculations long enough for the resulting accretion flow to reach a quasi-steady state. We have studied two limiting cases for the geometry of the injected magnetic field: pure toroidal field and pure poloidal field. In the case of toroidal field injection, the accreting matter forms a nearly axisymmetric, geometrically-thick, turbulent accretion disk. The disk resembles in many respects the convection-dominated accretion flows found in previous numerical and analytical investigations of viscous hydrodynamic flows. Models with poloidal field injection evolve through two distinct phases. In an initial transient phase, the flow forms a relatively flattened, quasi-Keplerian disk with a hot corona and a bipolar outflow. However, when the flow later achieves steady state, it changes in character completely. The magnetized accreting gas becomes two-phase, with most of the volume being dominated by a strong dipolar magnetic field from which a thermal low-density wind flows out. Accretion occurs mainly via narrow slowly-rotating radial streams which `diffuse' through the magnetic field with the help of magnetic reconnection events.

35 pages including 3 built-in plots and 14 separate jpg-plots; version accepted by ApJ

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• Self-similar structure of resistive ADAFs with outflow and large-scale magnetic field
• Inertial-Acoustic Oscillations of Black-Hole Accretion Discs with Large-Scale Poloidal Magnetic Fields
• GRMHD simulations of black hole accretion variabilities: Implications to hard state X-ray binary transients
• Accretion Structures around Kerr Black Holes in a Swirling Background
• On the Zeeman Effect in Magnetically-Arrested Disks
• An Observational Signature of Sub-Equipartition Magnetic Fields in the Spectra of Black Hole Binaries
• Jet Archaeology and Forecasting: Image Variability and Magnetic Field Configuration
• Resistive Hot Accretion Flows with Anisotropic Pressure
• X-ray constraint for the unseen companion of V723 Mon: it is a mass-gap black hole rather than binary neutron stars
• Magnetically controlled accretion onto a black hole
• Radiation-magnetohydrodynamics with MPI-AMRVAC using flux-limited diffusion
• The dependence of the viscosity-parameter on the disk scale height profile
• Evidence for Magneto-Levitation Accretion in Long-Period X-ray Pulsars
• A general relativistic magnetohydrodynamics extension to mesh-less schemes in the code GIZMO
• A New Interpretation for the Hot Corona in Active Galactic Nuclei
• A magnetic model for low/hard state of black hole binaries
• Steady plasma flows in a periodic non-symmetric domain
• A Red-Noise Eigenbasis for the Reconstruction of Blobby Images
• Explaining the 'outliers' track in Black Hole X-ray Binaries with the BZ-jet and inner-disk coupling
• The Core-shift of Sagittarius A* as a Discriminant between Disk and Jet Emission Models with millimeter-VLBI
• Extreme magnetic fields around black holes
• Effect of Magnetic Field on the Formation of Radiatively Inefficient Accretion Flow around Black Holes
• On the universality of the split monopole black hole magnetosphere
• MAD-Accretion Scenario in High-Mass X-Ray Binaries with Neutron Stars
• Binary black holes gone MAD: Magnetically arrested minidisks around nonspinning black holes
• Three-dimensional GRMHD simulations of jet formation and propagation in self-gravitating collapsing stars
• Algorithms and radiation dynamics for the vicinity of black holes I. Methods and codes
• Estimating the black hole mass of NGC1313 X-1 based on the spectral and timing properties
• PATOKA: Simulating Electromagnetic Observables of Black Hole Accretion
• Photon Ring Symmetries in Simulated Linear Polarization Images of Messier 87*
• Dynamics of charged dust particles in protoplanetary discs
• Accretion into black hole, and formation of magnetically arrested accretion disks
• Exploring the Role of Vector Potential and Plasma-$\beta$ in Jet Formation from Magnetized Accretion Flows
• GRMHD Simulations of Magnetized Accretion Disk/Jet: Variabilities of Black Holes and Spectral Energy Distributions in Magnetic States
• Observational distinguishability of the Kerr and Kerr-Hayward metrics to EHT
• Implications of the continuous radio-loudness distribution among AGNs in the local Universe
• Spherical accretion in the Schwarzschild spacetime in the Newtonian analogous construct
• Self-similar solution of hot accretion flow: the role of kinematic viscosity coefficient