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

Understand

We use the UKIDSS Ultra-Deep Survey, the deepest degree-scale near-infrared survey to date, to investigate the clustering of star-forming and passive galaxies to z ~ 3.5.

• Our new measurements include the first determination of the clustering for passive galaxies at z > 2, which we achieve using a cross-correlation technique.
• We find that passive galaxies are the most strongly 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 are consistent with models in which a critical halo mass determines the transition from star-forming to passive galaxies.