The Effects of Protostellar Jet Feedback on Turbulent Collapse
  We present results of hydrodynamic simulations of massive star forming
regions with and without protostellar jets. We show that jets change the
normalization of the stellar mass accretion rate, but do not strongly affect
the dynamics of star formation. In particular, $M_*(t) \propto f^2 (t-t_*)^2$
where $f = 1 - f_{\rm jet}$ is the fraction of mass accreted onto the
protostar, $f_{\rm jet}$ is the fraction ejected by the jet, and $(t-t_*)^2$ is
the time elapsed since the formation of the first star. The star formation
efficiency is nonlinear in time. We find that jets have only a small effect (of
order 25\%) on the accretion rate onto the protostellar disk (the "raw"
accretion rate). We show that the small scale structure -- the radial density,
velocity, and mass accretion profiles are very similar in the jet and no-jet
cases. Finally, we show that the inclusion of jets does drive turbulence but
only on small (parsec) scales.
