AGN-Driven Outflows in Dwarf Galaxies
  We present spatially resolved kinematic measurements of AGN-driven outflows
in dwarf galaxies in the stellar mass range $\sim6\times10^8 - 9\times10^9
M_\odot$, selected from SDSS DR7,8 and followed up with Keck/LRIS spectroscopy.
We find spatially extended ($\sim 1$ half light radius), high velocity ionized
gas outflows ($W_{80}$ up to $\sim2000\,\rm{km\,s}^{-1}$) in 13/50 dwarf
galaxies with and without AGN. Outflow velocities in all 13 galaxies exceed the
escape velocities of their halos. Nine of these 13 galaxies are classified as
AGN according to their narrow line flux ratios. Of these, six have outflow
components with emission line ratios consistent with AGN ionization. Although
black holes have been known to populate the centers of at least a few dwarf
galaxies, and indirect evidence of AGN quenching of star formation in dwarfs
has begun to surface, our measurements constitute the first direct detection
and measurement of AGN impact on the large scale kinematics and gas content in
dwarf galaxies. Furthermore, we find evidence suggestive of ongoing star
formation suppression, possibly regulated by the AGN. Galaxy formation models
must therefore be able to account not only for the formation and growth of
black holes at the centers of dwarf galaxies, but should also be revised to
include AGN as important -- and perhaps dominant -- sources of feedback in low
mass galaxies
