Multi-phase outflows in post starburst E+A galaxies -- II. A direct
  connection between the neutral and ionized outflow phases
  Post starburst E+A galaxies are systems that hosted a powerful starburst that
was quenched abruptly. Simulations suggest that these systems provide the
missing link between major merger ULIRGs and red and dead ellipticals, where
AGN feedback is responsible for the expulsion or destruction of the molecular
gas. However, many details remain unresolved and little is known about
AGN-driven winds in this short-lived phase. We present spatially-resolved IFU
spectroscopy with MUSE/VLT of SDSS J124754.95-033738.6, a post starburst E+A
galaxy with a recent starburst that started 70 Myrs ago and ended 30 Myrs ago,
with a peak SFR of $\sim 150\,\mathrm{M_{\odot}/yr}$. We detect disturbed gas
throughout the entire field of view, suggesting triggering by a minor merger.
We detect fast-moving multi-phased gas clouds, embedded in a double-cone
face-on outflow, which are traced by ionized emission lines and neutral NaID
\emph{emission} and absorption lines. We find remarkable similarities between
the kinematics, spatial extents, and line luminosities of the ionized and
neutral gas phases, and propose a model in which they are part of the same
outflowing clouds, which are exposed to both stellar and AGN radiation. Our
photoionization model provides consistent ionized line ratios, NaID absorption
optical depths and EWs, and dust reddening. Using the model, we estimate, for
the first time, the neutral-to-ionized gas mass ratio (about 20), the sodium
neutral fraction, and the size of the outflowing clouds. This is one of the
best ever observed direct connections between the neutral and ionized outflow
phases in AGN.
