tokens: Acknowledgments The authors thank Volker Springel for providing us with gadget 3 , and Giuseppe Murante for useful discussion. Data post-processing and storage has been done on the CINECA facility PICO, granted us thanks to our expression of interest. Partial support from Consorzio per la Fisica di Trieste is acknowledged. EM has been supported by PRIN MIUR 2010-2011 J91J12000450001 The dark Universe and the cosmic evolution of baryons: from current surveys to Euclid and by a University of Trieste grant. PM has been supported by PRIN-INAF 2009 Towards an Italian Network for Computational Cosmology and by a F.R.A. 2012 grant by the University of Trieste. SB has been supported by PRIN MIUR 01278X4FL grant and by the InDark INFN Grant. SA has been supported by a Department of Energy grant de-sc0009946 and by NSF-AST 0908241.
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