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We compare the predictions of Horizon-AGN, a hydro-dynamical cosmologicalsimulation that uses an adaptive mesh refinement code, to observational data inthe redshift range 0<z<6. We study the reproduction, by the simulation, ofquantities that trace the aggregate stellar-mass growth of galaxies over cosmictime: luminosity and stellar-mass functions, the star formation main sequence,rest-frame UV-optical-near infrared colours and the cosmic star-formationhistory. We show that Horizon-AGN, which is not tuned to reproduce the localUniverse, produces good overall agreement with these quantities, from thepresent day to the epoch when the Universe was 5% of its current age. Bycomparison to Horizon-noAGN, a twin simulation without AGN feedback, wequantify how feedback from black holes is likely to help shape galaxystellar-mass growth in the redshift range 0<z<6, particularly in the mostmassive galaxies. Our results demonstrate that Horizon-AGN successfullycaptures the evolutionary trends of observed galaxies over the lifetime of theUniverse, making it an excellent tool for studying the processes that drivegalaxy evolution and making predictions for the next generation of galaxysurveys.

The Horizon-AGN simulation: evolution of galaxy properties over cosmic time