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(abridged) We present a new near-infrared survey covering the 2 deg sq COSMOSfield. Combining our survey with Subaru B and z images we construct a deep,wide-field optical-infrared catalogue. At Ks<23 (AB magnitudes) our surveycompleteness is greater than 90% and 70% for stars and galaxies respectivelyand contains 143,466 galaxies and 13,254 stars. At z~2 our catalogues contain3931 quiescent and 25,757 star-forming BzK-selected galaxies representing thelargest and most secure sample of these objects to date. Our counts ofquiescent galaxies turns over at Ks~22 an effect which we demonstrate cannot bedue to sample incompleteness. In our survey both the number of faint and brightquiescent objects exceeds the predictions of a semi-analytic galaxy formationmodel, indicating potentially the need for further refinements in the amount ofmerging and AGN feedback at z~2 in these models. We measure the angularcorrelation function for each sample and find that at small scales thecorrelation function for passive BzK galaxies exceeds the clustering of darkmatter. We use 30-band photometric redshifts to derive the spatial correlationlength and the redshift distributions for each object class. At Ks<22 we findr_0^{\gamma/1.8}=7.0 +/-0.5h^{-1} Mpc for the passive BzK candidates and4.7+/-0.8h^{-1} Mpc for the star-forming BzK galaxies. Our pBzK galaxies havean average photometric redshift of z_p~1.4, in approximate agreement with thelimited spectroscopic information currently available. The stacked Ks imagewill be made publicly available from IRSA.

The COSMOS-WIRCam near-infrared imaging survey: I: BzK selected passive and star forming galaxy candidates at z>1.4