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We use the UKIDSS Ultra-Deep Survey, the deepest degree-scale near-infraredsurvey to date, to investigate the clustering of star-forming and passivegalaxies to z ~ 3.5. Our new measurements include the first determination ofthe clustering for passive galaxies at z > 2, which we achieve using across-correlation technique. We find that passive galaxies are the moststrongly clustered, typically hosted by massive dark matter halos with M_halo >5 x 10^12 M_sun irrespective of redshift or stellar mass. Our findings areconsistent with models in which a critical halo mass determines the transitionfrom star-forming to passive galaxies. Star-forming galaxies show no strongcorrelation between stellar mass and halo mass, but passive galaxies showevidence for an anti-correlation; low-mass passive galaxies appear, on average,to be located in the most massive halos. These results can be understood if thetermination of star formation is most efficient for galaxies of low stellarmass in very dense environments.

Studying the emergence of the red sequence through galaxy clustering: host halo masses at z > 2