Accretion Disks in Active Galactic Nuclei: Gas Supply Driven by Star Formation

Abstract

Self-gravitating accretion disks collapse to star-forming(SF) regions extending to the inner edge of the dusty torus in active galactic nuclei (AGNs). A full set of equations including feedback of star formation is given to describe the dynamics of the regions. We explore the role of supernovae explosion (SNexp), acting to excite turbulent viscosity, in the transportation of angular momentum in the regions within 1pc scale. We find that accretion disks with typical rates in AGNs can be driven by SNexp in the regions and metals are produced spontaneously. The present model predicts a metallicity--luminosity relationship consistent with that observed in AGNs. As relics of SF regions, a ring (or belt) consisting of old stars remains for every episode of supermassive black hole activity. We suggest that multiple stellar rings with random directions interact and form a nuclear star cluster after episodes driven by star formation.

emulateapj.sty, 5 page, 4 figures (in press)

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• Accretion-modified Stars in Accretion Disks of Active Galactic Nuclei: Slowly Transient Appearance
• The mass-metallicity relation of SDSS quasars
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• The Contribution of Host Galaxies to the Infrared Energy Output of $z\gtrsim 5.0$ QUASARS
• Outflows from active galactic nuclei: The BLR-NLR metallicity correlation
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• In-situ star formation in accretion disk and explanation for correlation between black hole mass and metallicity in AGNs
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• Radiative Cooling II: Effects of Density and Metallicity
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• Intervening BLR Clouds' Effects on Optical/UV Spectrum
• Can a binary neutron star merger in the vicinity of a supermassive black hole enable a detection of a post-merger gravitational wave signal?
• Nucleosynthesis Contribution of Neutrino-dominated Accretion Flows to the Chemical Evolution of Active Galactic Nuclei
• Evolution of gaseous disk viscosity driven by supernova explosion. II. Structure and emissions from star-forming galaxies at high redshift
• Evolution of Warped Accretion Disks in Active Galactic Nuclei. I. Roles of Feeding at the Outer Boundaries
• Structure of radiation dominated gravitoturbulent quasar discs