  Recently Umemura, Fukue, & Mineshige (1997) proposed the radiative avalanche
fueling to active galactic nuclei; gas accretion is driven by radiation drag
exerted by stellar radiation from circumnuclear starburst regions. This
mechanism is also interesting in terms of starburst-AGN connections. We
therefore present observational tests for the 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 for typical active galactic nuclei with the circumnuclear starburst
regions. Instead we propose an alternative, possible starburst-AGN connection;
a minor merger with a nucleated satellite drives circumnuclear starbursts and
then leads to gas fueling onto the central engine as the merger proceeds.
