Global structure and dynamics of slowly rotating accretion flows
arXiv:2208.13369 · doi:10.1093/mnras/stac2454
Abstract
We study the global solutions of slowly rotating accretion flows around the supermassive black hole in the nucleus of an elliptical galaxy. The velocity of accreted gas surrounding the black hole is initially subsonic and then falls onto the black hole supersonically, so accretion flow must be transonic. We numerically solve equations from the Bondi radius to near the black hole. The focus of our discussion will be on the properties of slightly rotating accretion flows in which radiative losses have been ignored. This study discusses how outer boundary conditions (the temperature and specific angular momentum at the outer boundary) influence accretion flow dynamics. We investigate two physically discontinuous regimes: The Bondi-like type accretion and the Disk-like type accretion. A Bondi-like accretion occurs when the specific angular momentum at the Bondi radius is smaller than the specific angular momentum at the marginally stable orbit . In comparison, a Disk-like accretion occurs when the specific angular momentum at the Bondi radius is larger than the specific angular momentum of the marginally stable orbit . We also keep the assumption of hydrostatic equilibrium and compare our results with the case in which it is not considered. According to this study, considering the assumption of hydrostatic equilibrium reduces the mass accretion rate. Additionally, we find our solution for different ranges of the viscosity parameter . Finally, we study the effect of galaxy potential on slowly rotating accretion flows.
arXiv commentAccepted for publication in MNRAS
References in corpus (31)
- Coevolution (Or Not) of Supermassive Black Holes and Host Galaxies
- Observational Evidence of AGN Feedback
- The slope of the black-hole mass versus velocity dispersion correlation
- The M-sigma and M-L Relations in Galactic Bulges and Determinations of their Intrinsic Scatter
- Hot Accretion Flows Around Black Holes
- Simulating galaxy formation with black hole driven thermal and kinetic feedback
- Nuclear Activity in Nearby Galaxies
- Thermal Equilibria of Accretion Disks
- Advection-Dominated Accretion and the Black Hole Event Horizon
- Hot Gas In and Around Elliptical Galaxies
- Numerical Simulation of Hot Accretion Flows (II): Nature, Origin, and Properties of Outflow and Their Possible Observational Applications
- The M-sigma Relation in Local Active Galaxies
- Unifying the micro and macro properties of AGN feeding and feedback
- Accretion of low angular momentum material onto black holes: 2D hydrodynamical inviscid case
- Bondi flow from a slowly rotating hot atmosphere
- Hydrodynamical numerical simulation of wind production from black hole hot accretion flows at very large radii
- Global Dynamics of Advection-Dominated Accretion Revisited
- The Cooling Flow to Accretion Flow Transition
- Jeans analysis in modified gravity
- Accretion flows: the Role of the Outer Boundary Condition
- Isothermal Bondi accretion in Jaffe and Hernquist galaxies with a central black hole: fully analytical solutions
- Bondi accretion in early-type galaxies
- Why Canonical Disks Cannot Produce Advection Dominated Flows
- Isothermal Bondi accretion in two-component Jaffe galaxies with a central black hole
- Mass Accretion Rate of Rotating Viscous Accretion Flow
- A Generalised Bondi Accretion Model for the Galactic Centre
- Bondi accretion in the finite luminous region of elliptical galaxies
- On the polytropic Bondi accretion in two-component galaxy models with a central massive BH
- The Effect of Accretion Environment at Large Radius on Hot Accretion Flows
- Dynamical and thermal properties of the parsec-scale gases spherically accreted onto low luminous active galactic nuclei
- Effect of nuclear stars gravity on quasar radiation feedback on the parsec-scale