  HH80N is one of the Herbig-Haro objects that have associated quiescent dense
clumps. We report CO and CS BIMA observations that reveal star formation within
the HH80N dense clump. The CO emission reveals clearly a bipolar molecular
outflow centered on the dense clump. The CS emission traces a ring-like
structure of radius ~0.24 pc. The CS kinematics shows that the ring is
collapsing with an infall speed of ~0.6 km/s. The required mass to produce the
collapse is in agreement with previous ammonia observations of the 20 solar
mass core, which is embedded within the CS structure. However, we cannot
discard that the ring structure is expanding driven by protostellar winds, if
the CS abundance if unusually high and the CO momentum rate is much higher than
that measured, due to inclination and optical depth effects. The properties of
the molecular outflow and of the dense core suggest that it harbors a Class 0
object. There are also signatures of interaction of the HH 80/81/80N outflow
with the dense gas. In particular it is possible that the HH 80/81/80N outflow
has triggered or at least speed up the star formation in this region.
