The MaGICC volume: reproducing statistical properties of high redshift
  galaxies
  We present a cosmological hydrodynamical simulation of a representative
volume of the Universe, as part of the Making Galaxies in a Cosmological
Context (MaGICC) project. MaGICC uses a thermal implementation for supernova
and early stellar feedback. This work tests the feedback model at lower
resolution across a range of galaxy masses, morphologies and merger histories.
The simulated sample compares well with observations of high redshift galaxies
($z \ge 2$) including the stellar mass - halo mass ($M_\star - M_h$ ) relation,
the Galaxy Stellar Mass Function (GSMF) at low masses ($M_\star \lt 5 \times
10^{10} M_\odot$ ) and the number density evolution of low mass galaxies. The
poor match of $M_\star - M_h$ and the GSMF at high masses ($M_\star \ge 5
\times 10^{10} M_\odot$ ) indicates supernova feedback is insufficient to limit
star formation in these haloes. At $z = 0$, our model produces too many stars
in massive galaxies and slightly underpredicts the stellar mass around
$L_\star$ mass galaxy. Altogether our results suggest that early stellar
feedback, in conjunction with supernovae feedback, plays a major role in
regulating the properties of low mass galaxies at high redshift.
