The Molecular Wind in the Nearest Seyfert Galaxy Circinus Revealed by
  ALMA
  We present ALMA observations of the inner 1' (1.2 kpc) of the Circinus
galaxy, the nearest Seyfert. We target CO (1-0) in the region associated with a
well-known multiphase outflow driven by the central active galactic nucleus
(AGN). While the geometry of Circinus and its outflow make disentangling the
latter difficult, we see indications of outflowing molecular gas at velocities
consistent with the ionized outflow. We constrain the mass of the outflowing
molecular gas to be 1.5e5 -5.1e6 solar masses, yielding a molecular outflow
rate of 0.35-12.3 solar masses per year. The values within this range are
comparable to the star formation rate in Circinus, indicating that the outflow
indeed regulates star formation to some degree. The molecular outflow in
Circinus is considerably lower in mass and energetics than previously-studied
AGN-driven outflows, especially given its high ratio of AGN luminosity to
bolometric luminosity. The molecular outflow in Circinus is, however,
consistent with some trends put forth in Cicone et al. (2014), including a
linear relation between kinetic power and AGN luminosity, as well as its
momentum rate vs. bolometric luminosity (although the latter places Circinus
among the starburst galaxies in that sample). We detect additional molecular
species including CN and C17O.
