ALMA images the many faces of the NGC1068 torus and its surroundings
  We investigate the fueling and the feedback of nuclear activity in the
Seyfert 2 galaxy NGC1068, by studying the distribution and kinematics of
molecular gas in the torus and its connections. We use ALMA to image the
emission of a set of molecular gas tracers in the circumnuclear disk (CND) and
the torus of the galaxy using the CO(2-1), CO(3-2) and HCO+(4-3) lines with
spatial resolutions ~0.03"-0.09"(2-6pc). ALMA resolves the CND as an asymmetric
ringed disk of D~400pc-size and mass of ~1.4x10^8 Msun. The inner edge of the
ring is associated with edge-brightened arcs of NIR polarized emission
identified with the working surface of the AGN ionized wind. ALMA proves the
existence of a molecular torus of M_torus ~ 3x10^5Msun, which extends over a
large range of spatial scales D=10-30pc around the central engine. The new
observations evidence the density radial stratification of the torus: the
HCO+(4-3) torus, with a full size D=11pc, is a factor of 2-3 smaller than its
CO(2-1) and CO(3-2) counterparts, which have full-sizes D=26pc and D=28pc,
respectively. The torus is connected to the CND through a network of gas
streamers. The kinematics of molecular gas show strong departures from circular
motions in the torus, the gas streamers, and the CND. These velocity
distortions are interconnected and are part of a 3D outflow that reflects the
effects of AGN feedback on the kinematics of molecular gas across a wide range
of spatial scales. We conclude that a wide-angle AGN wind launched from the
accretion disk is impacting a sizeable fraction of the gas inside the torus
(~0.4-0.6 x M_torus). However, a large gas reservoir (~1.2-1.8 x 10^5Msun)
close to the equatorial plane of the torus remains unaffected by the AGN wind
and can continue fueling the AGN for ~1-4Myr. AGN fueling seems nevertheless
thwarted on intermediate scales (15pc < r < 50pc).
