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 (29)

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Cited by in corpus (28)

• The dynamical evolution of molecular clouds near the Galactic Centre - I. Orbital structure and evolutionary timeline
• Large scale kinematics and dynamical modelling of the Milky Way nuclear star cluster
• The interplay between a galactic bar and a supermassive black hole: nuclear fueling in a sub-parsec resolution galaxy simulation
• Simulations of the Milky Way's central molecular zone -- I. Gas dynamics
• ALMA resolves the spiraling accretion flow in the luminous OB cluster forming region G33.92+0.11
• 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
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• Molecular Gas Feeding the Circumnuclear Disk of the Galactic Center
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• 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
• From the Circumnuclear Disk in the Galactic Center to thick, obscuring tori of AGNs -- Modelling the molecular emission of a parsec-scale torus as found in NGC1068