Simulating the interstellar medium and stellar feedback on a moving
  mesh: Implementation and isolated galaxies
  We introduce the Stars and MUltiphase Gas in GaLaxiEs -- SMUGGLE model, an
explicit and comprehensive stellar feedback model for the moving-mesh code
arepo. This novel sub-resolution model resolves the multiphase gas structure of
the interstellar medium and self-consistently generates gaseous outflows. The
model implements crucial aspects of stellar feedback including photoionization,
radiation pressure, energy and momentum injection from stellar winds and from
supernovae. We explore this model in high-resolution isolated simulations of
Milky Way-like disc galaxies. Stellar feedback regulates star formation to the
observed level and naturally captures the establishment of a Kennicutt-Schmidt
relation. This result is achieved independent of the numerical mass and spatial
resolution of the simulations. Gaseous outflows are generated with average mass
loading factors of the order of unity. Strong outflow activity is correlated
with peaks in the star formation history of the galaxy with evidence that most
of the ejected gas eventually rains down onto the disc in a galactic fountain
flow that sustains late-time star formation. Finally, the interstellar gas in
the galaxy shows a distinct multiphase distribution with a coexistence of cold,
warm and hot phases.
