Abstract
We study the galaxy mass assembly and cosmic star formation rate (SFR) at
high-redshift (z>4), by comparing data from multiwavelength surveys with
predictions from the GAlaxy Evolution and Assembly (GAEA) model. GAEA
implements an improved stellar feedback scheme based on cosmological
hydrodynamical simulations (FIRE), that features strong stellar driven
outflows, and it is able to correctly reproduce the evolution of the galaxy
stellar mass function (GSMF) up to z$\sim$3. We contrast model predictions with
both rest-frame Ultra-Violet (UV) and optical luminosity functions (LF), which
are mostly sensible to the SFR and stellar mass, respectively. We show that
GAEA is able to reproduce the shape and redshift evolution of both sets of LFs.
In addition, the required level of dust attenuation is in qualitative agreement
with recent estimates based on the UV continuum slope. The consistency between
data and model predictions holds for the redshift evolution of the physical
quantities: GAEA is able to recover the evolution of the GSMF up to z$\sim$7
and the cosmic SFR density up to z$\sim$10.
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