Does the Radiative Avalanche Fueling Work in Any Active Galactic Nuclei?

Recently Umemura, Fukue, & Mineshige proposed radiative avalanche fueling to active galactic nuclei, viz., gas accretion is driven by the radiation drag exerted by stellar radiation from circumnuclear starburst regions. This mechanism is also interesting in terms of starburst-AGN connections. We here present observational tests for radiative avalanche fueling. Our tests, however, show that gas accretion rates driven by the radiative avalanche are significantly lower than those expected from the standard accretion theory applied to typical active galactic nuclei with circumnuclear starburst regions. We thus propose an alternative, possible starburst-AGN connection, viz., a minor merger with a nucleated satellite drives circumnuclear starbursts which leads to gas fueling onto the central engine as the merger proceeds.