  Feedback likely plays a crucial role in resolving discrepancies between
observed and theoretical predictions of dwarf galaxy properties. Stellar
feedback was once believed to be sufficient to explain these discrepancies, but
it has thus far failed to fully reconcile theory and observations. The recent
discovery of energetic galaxy-wide outflows in dwarf galaxies hosting Active
Galactic Nuclei (AGN) suggests that AGN feedback may have a larger role in the
evolution of dwarf galaxies than previously suspected. In order to assess the
relative importance of stellar versus AGN feedback in these galaxies, we
perform a detailed Keck/KCWI optical integral field spectroscopic study of a
sample of low-redshift star-forming (SF) dwarf galaxies that show outflows in
ionized gas in their SDSS spectra. We characterize the outflows and compare
them to observations of AGN-driven outflows in dwarfs. We find that SF dwarfs
have outflow components that have comparable widths (W$_{80}$) to those of
outflows in AGN dwarfs, but are much less blue-shifted, indicating that SF
dwarfs have significantly slower outflows than their AGN counterparts. The
outflows in SF dwarfs are spatially resolved and significantly more extended
than those in AGN dwarfs. The mass loss rates, momentum and energy rates of
SF-driven outflows are much lower than those of AGN-driven outflows. Our
results indicate that AGN feedback in the form of gas outflows may play an
important role in dwarf galaxies and should be considered along with SF
feedback in models of dwarf galaxy evolution.

Astrophysics of Galaxies