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We examine whether large-scale environment affects the mass assembly historyof their central galaxies. To facilitate this, we constructed dark matter halomerger trees from a cosmological N-body simulation and calculated the formationand evolution of galaxies using a semi-analytic method. We confirm earlierresults that smaller halos show a notable difference in formation time with amild dependence on large-scale environment. However, using a semi-analyticmodel, we found that on average the growth rate of the stellar mass of centralgalaxies is largely insensitive to large-scale environment. Although ourresults show that the star formation rate (SFR) and the stellar mass of centralgalaxies in smaller halos are slightly affected by the assembly bias of halos,those galaxies are faint, and the difference in the SFR is minute, andtherefore it is challenging to detect it in real galaxies given the currentobservational accuracy. Future galaxy surveys, such as the BigBOSS experimentand the Large Synoptic Survey Telescope, which are expected to provideobservational data for fainter objects, will provide a chance to test our modelpredictions.

Effects of large-scale environment on the assembly history of central galaxies