The evolution of the simulated and observed SFRs of galaxies in the Past 13 billion years.

I present the evolution of the galaxy Star Formation Rate Function (SFRF), star formation rate-stellar mass relation (SFR - M*) and Cosmic Star Formation Rate Density (CSFRD) of z = 0 - 8 galaxies employing both the Evolution and Assembly of GaLaxies and their Environments (EAGLE) simulations and a compilation of UV, Ha and IR data. While I present comparisons between the above, I evaluate the effect and importance of supernovae/active galactic nuclei feedback. The relation between the star formation rate and stellar mass of galaxies represents a fundamental constraint on galaxy formation, and has been studied extensively both in observations and cosmological hydrodynamic simulations. However, a tension between the above is reported in the literature. I present the evolution of the SFR-M* relation and demonstrate the inconsistencies between observations that are retrieved using different methods. I employ cosmological hydrodynamic simulations combined with radiative transfer methods  and compare these with a range of observed data in order to investigate further the root of this tension. Last, I present the scatter of the SFR-M* relation and investigate which mechanisms drive its shape and evolution.