Large-scale dynamics of winds originated from black hole accretion flows: (II) Magnetohydrodynamics

Abstract

Winds from black hole accretion disks are essential ingredients in understanding the coevolution between the supermassive black hole and its host galaxy. The great difference of dynamical ranges from small-scale accretion disk simulations to large-scale or cosmological simulations places barriers to track wind kinematics. In the first paper of this series, we have studied the dynamics of disk winds from the outer edge of the accretion disk toward galaxy scales in the hydrodynamical framework. In this paper, we further incorporate magnetic fields to understand the wind dynamics by adopting one-dimensional magnetohydrodynamical (MHD) model, with boundary conditions set for hot accretion flows. The geometry of poloidal magnetic field is prescribed as a straight line with an angle $\theta =45^{\circ }$ from the rotational axis, and the strength satisfies the divergence free condition. The wind solution is achieved through requesting gas to pass through the slow, Alfvén and fast magneto-sonic points smoothly. Physical quantities are found to show a power-law dependence on cylindrical radius $R$ beyond the fast magneto-sonic point, for which $\rho \propto R^{-2},v_{\mathrm{p}}\propto const.,v_{\varphi }\propto R^{-1},B_{\varphi }\propto R^{-1},$ and $\beta \propto {\rho }^{\gamma -1}$. The magnetization of wind is dominant in determining the wind properties. The wind is accelerated to a greater terminal velocity with strong magnetization ($v_{Ap0}>1$) compared to the hydrodynamical case, which the magnetic pressure gradient dominates and the centrifugal potential converts to the kinetic energy. The dependance of wind physical quantities on magnetization, temperature, field line angular velocity, and adiabatic index is also discussed.

arXiv commentAccepted for Publication in ApJ

References in corpus (44)

• Advection-Dominated Accretion: A Self-Similar Solution
• On the Fate of Gas Accreting at a Low Rate onto a Black Hole
• Simulating galaxy formation with black hole driven thermal and kinetic feedback
• Dynamics of line-driven disk winds in Active Galactic Nuclei
• Magnetically Arrested Disk: An Energetically Efficient Accretion Flow
• Nonthermal Electrons in Radiatively Inefficient Accretion Flow Models of Sagittarius A*
• Dynamics of Line-Driven Disk Winds in Active Galactic Nuclei II: Effects of Disk Radiation
• GRMHD Simulations of Magnetized Advection Dominated Accretion on a Non-Spinning Black Hole: Role of Outflows
• Numerical Simulation of Hot Accretion Flows (II): Nature, Origin, and Properties of Outflow and Their Possible Observational Applications
• Momentum Driving: which physical processes dominate AGN feedback?
• Photoevaporation of Circumstellar Disks around Young Stars
• Numerical Simulation of Hot Accretion Flows (III): Revisiting wind properties using trajectory approach
• On Why Disks Generate Magnetic Towers and Collimate Jets
• Feedback from central black holes in elliptical galaxies. III: models with both radiative and mechanical feedback
• Numerical Simulation of Hot Accretion Flows (I): A Large Radial Dynamical Range and the Density Profile of Accretion Flow
• Radiative and Momentum Based Mechanical AGN Feedback in a 3-Dimensional Galaxy Evolution Code
• MHD simulations of jet acceleration from Keplerian accretion disks: the effects of disk resistivity
• Magneto-thermal Disk Wind from Protoplanetary Disks
• Magneto-Centrifugal Launching of Jets from Accretion Disks. I: Cold Axisymmetric Flows
• Magneto-centrifugally driven winds: comparison of MHD simulations with theory
• MHD Accretion-Disk Winds as X-ray Absorbers in AGNs
• Radiative Transfer and Acceleration in Magnetocentrifugal Winds
• Numerical simulations of mass outflows driven from accretion disks by radiation and magnetic forces
• On the role of the UV and X-ray radiation in driving a disk wind in X-ray binaries
• Active Galactic Nuclei Feedback in an Elliptical Galaxy with the Most Updated AGN Physics (I): Low-angular Momentum Case
• A disk-wind model with correct crossing of all MHD critical surfaces
• Rotating Accretion Flows: From Infinity to the Black Hole
• Self-Similar Magnetocentrifugal Disk Winds with Cylindrical Asymptotics
• The Effect of the AGN Feedback on the Interstellar Medium of Early-Type Galaxies: 2D Hydrodynamical Simulations of the Low-Rotation Case
• Controlling the collimation and rotation of hydromagnetic disk winds
• Acceleration and collimation of relativistic MHD disk winds
• On the properties of thermal disk winds in X-ray transient sources: a case study of GRO J1655-40
• The Structure of Magnetocentrifugal Winds I. Steady Mass Loading
• Line-driven disk wind model for ultra-fast outflows in active galactic nuclei -- Scaling with luminosity
• AGN feedback, quiescence and CGM metal enrichment in early-type galaxies
• The outflows accelerated by the magnetic fields and radiation force of accretion disks
• Active Galactic Nuclei Feedback in an Elliptical Galaxy with the Most Updated AGN Physics (II): High-Angular Momentum Case
• Lecture notes: Astrophysical fluid dynamics
• A self-similar solution for thermal disc winds
• Magnetothermal disk winds in X-ray binaries: poloidal magnetic fields suppress thermal winds
• On the Role of Hot Feedback Mode in Active Galactic Nuclei Feedback in an Elliptical Galaxy
• Parker Winds Revisited: An Extension to Disc Winds
• Large-scale dynamics of winds originated from black hole accretion flows: (I) Hydrodynamics
• The Effects of Magnetic Field Strength on Properties of Wind Generated from Hot Accretion Flow

Cited by in corpus (9)

• The Accretion flow in M87 is really MAD
• Numerical simulation of hot accretion flows (IV): effects of black hole spin and magnetic field strength on the wind and the comparison between wind and jet properties
• Speed limits for radiation driven SMBH winds
• The properties of wind and jet from a super-Eddington accretion flow around a supermassive black hole
• Supermassive black hole formation via collisions in black hole clusters
• The large-scale magnetic field advected in the corona of a thin accretion disk
• Active Galactic Nucleus Feedback in an Elliptical Galaxy with the Most Updated AGN Physics: Parameter Explorations
• The lively accretion disc in NGC 2992. III. Tentative evidence of rapid Ultra Fast Outflow variability
• Large-scale Dynamics of Winds Driven by Line Force from a Thin Accretion Disk