Linking the Supermassive Black Hole Growth with the Megamaser Emission
  High-resolution observations of the central few 100 pc of the galactic
nuclear environments remain prohibitive for large statistical samples, which
are crucial for tracing the links between central black hole formation, galaxy
formation and AGN activity over cosmic time. With this contribution, we present
novel ways of connecting the physics of black hole accretion with its immediate
environs via a new quantitative evaluation of the degree to which the strength
and spatial configuration of the water maser emission is associated with the
nuclear nebular galactic activity. We discuss possible evolutionary/causal
connections between these two types of emission, together with criteria that
could dramatically enhance our search for mega-maser systems in nearby galactic
centers. These are timely results given the interest in combining
high-resolution observations with extremely large optical telescopes and large
arrays that start to conquer the sub-millimeter window.
