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We use 80922 galaxies in the Galaxy And Mass Assembly (GAMA) survey tomeasure the galaxy luminosity function (LF) in different environments over theredshift range 0.04<z<0.26. The depth and size of GAMA allows us to definesamples split by colour and redshift to measure the dependence of the LF onenvironment, redshift and colour. We find that the LF varies smoothly withoverdensity, consistent with previous results, with little environmentaldependent evolution over the last 3 Gyrs. The modified GALFORM modelpredictions agree remarkably well with our LFs split by environment,particularly in the most overdense environments. The LFs predicted by the modelfor both blue and red galaxies are consistent with GAMA for the environmentsand luminosities at which such galaxies dominate. Discrepancies between themodel and the data seen in the faint end of the LF suggest too many faint redgalaxies are predicted, which is likely to be due to the over-quenching ofsatellite galaxies. The excess of bright blue galaxies predicted in underdenseregions could be due to the implementation of AGN feedback not beingsufficiently effective in the lower mass halos.

Galaxy And Mass Assembly (GAMA): The dependence of the galaxy luminosity function on environment, redshift and colour