The Inner 2 pc of Sagittarius A*: Simulations of the Circumnuclear Disk and Multiphase Gas Accretion in the Galactic Center

Abstract

We present hydrodynamic simulations of the inner few parsecs of the Milky Way's Galactic Center that, for the first time, combine a realistic treatment of stellar winds and the circumnuclear disk as they interact with the gravitational potential of the nuclear star cluster and Sagittarius~A*. We observe a complex interaction of the stellar winds with the inner edge of the circumnuclear disk, which leads to the growth of instabilities, induced accretion of cool gas from the inner edge of the disk, and the eventual formation of a small accretion disk of $\sim 10^4-10^5$ K within $r\sim 0.1$ pc.

26 pages, 16 figures, (Submitted to ApJ)

References in corpus (23)

• Physical Properties of Wolf-Rayet Stars
• The Two Young Star Disks in the Central Parsec of the Galaxy: Properties, Dynamics and Formation
• The Athena++ Adaptive Mesh Refinement Framework: Design and Magnetohydrodynamic Solvers
• An Update on Monitoring Stellar Orbits in the Galactic Center
• The old nuclear star cluster in the Milky Way: dynamics, mass, statistical parallax, and black hole mass
• Stellar and wind properties of massive stars in the central parsec of the Galaxy
• Large scale kinematics and dynamical modelling of the Milky Way nuclear star cluster
• Dynamics of Ionized Gas at the Galactic Center: VLA Observations of the 3D Velocity Field and Location of the Ionized Streams in Sagittarius A West
• Variable accretion and emission from the stellar winds in the Galactic centre
• An Exact Integration Scheme for Radiative Cooling in Hydrodynamical Simulations
• Ab Initio Horizon-Scale Simulations of Magnetically Arrested Accretion in Sagittarius A* Fed by Stellar Winds
• The nuclear cluster of the Milky Way: Our primary testbed for the interaction of a dense star cluster with a massive black hole
• Triaxial orbit-based modelling of the Milky Way Nuclear Star Cluster
• The Surprisingly Small Impact of Magnetic Fields On The Inner Accretion Flow of Sagittarius A* Fueled By Stellar Winds
• New constraints on the structure of the nuclear stellar cluster of the Milky Way from star counts and MIR imaging
• The young stars in the Galactic Center
• A Cool Accretion Disk around the Galactic Centre Black Hole
• Stellar winds pump the heart of the Milky Way
• The Circumnuclear Disk Revealed by ALMA. I. Dense Clouds and Tides in the Galactic Center
• The role of feedback in accretion on Low Luminosity AGN: Sgr A* case study
• Analytical Model of Disk Evaporation and State Transitions in Accreting Black Holes
• Effects of turbulence in the Circumnuclear Disk
• Revealing the Physical Conditions around Sgr A* using Bayesian Inference -- I. Observations and Radiative Transfer

Cited by in corpus (8)

• The formation and stability of a cold disc made out of stellar winds in the Galactic Centre
• Mass flows in the Galactic Center by supernovae of the circumnuclear disk
• Compact stellar systems hosting an intermediate mass black hole: magnetohydrodynamic study of inflow-outflow dynamics
• The Discovery of an Active Wind from the Milky Way's Black Hole
• Tidal phenomena in the Galactic Center: The curious case of X7
• High Energy Emission from the Galactic Center
• The Complex Magnetic Field of the Extreme Galactic Center: PRIMA Science Potential
• Supergiant GCIRS 22 in the Milky Way Nuclear Star Cluster: Revised alpha abundances