Milky Way Supermassive Black Hole: Dynamical Feeding from the Circumnuclear Environment

Abstract

The supermassive black hole (SMBH), Sgr A*, at the Galactic Center is surrounded by a molecular circumnuclear disk (CND) lying between 1.5-4 pc radii. The irregular and clumpy structures of the CND, suggest dynamical evolution and episodic feeding of gas towards the central SMBH. New sensitive data from the SMA and GBT, reveal several >5-10 pc scale molecular arms, which either directly connect to the CND, or may penetrate inside the CND. The CND appears to be the convergence of the innermost parts of largescale gas streamers, which are responding to the central gravitational potential well. Rather than being a quasi-stationary structure, the CND may be dynamically evolving, incorporating inflow via streamers, and feeding gas towards the center.

9 pages, 7 figures, accepted to ApJ

References in corpus (6)

• The Two Young Star Disks in the Central Parsec of the Galaxy: Properties, Dynamics and Formation
• A Close Look at Star Formation around Active Galactic Nuclei
• Star Formation Around Super-Massive Black Holes
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• On the Formation of Compact Stellar Disks Around Sgr A*
• Optimization of Moment Masking for CO Spectral Line Surveys

Cited by in corpus (28)

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• Simulations of the Milky Way's central molecular zone -- I. Gas dynamics
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• Traces of past activity in the Galactic Centre
• The Excitation of HCN and HCO+ in the Galactic Center Circumnuclear Disk
• Numerical simulations of the possible origin of the two sub-parsec scale and counter-rotating stellar disks around SgrA*
• ISM Processing in the Inner 20 pc in Galactic center
• The Circumnuclear Disk Revealed by ALMA. I. Dense Clouds and Tides in the Galactic Center
• Approaching hell's kitchen: Molecular daredevil clouds in the vicinity of Sgr A*
• Molecular Gas Feeding the Circumnuclear Disk of the Galactic Center
• Modelling the formation of the circumnuclear ring in the Galactic centre
• Star Formation and Dynamics in the Galactic Centre
• The 492 GHz emission of Sgr A* constrained by ALMA
• Kinematics and star formation toward W33: a central hub as a hub--filament system
• SOFIA/FORCAST Galactic Center Legacy Survey: Overview
• Physical Contact between the +20 km/s Cloud and the Galactic Circumnuclear Disk
• Forming circumnuclear disks and rings in galactic nuclei: a competition between supermassive black hole and nuclear star cluster
• The Fossil Nuclear Outflow in the Central 30 pc of the Galactic Center
• Effects of turbulence in the Circumnuclear Disk
• The OH-streamer in Sgr A revisited: analysis of hydroxyl absorption within 10 pc from the Galactic centre
• The Milky Way's Central Molecular Zone
• The Nuclear Filaments inside the Circumnuclear Disk in the Central 0.5 pc of the Galactic center
• A common origin for the circumnuclear disc and the nearby molecular clouds in the Galactic Centre
• The connecting molecular ridge in the Galactic center
• Feeding and Feedback in nearby AGN - Comparison with the Milky Way center
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