CLUSTERING OF INFRARED-BRIGHT DUST-OBSCURED GALAXIES REVEALED BY THE HYPER SUPRIME-CAM AND WISE

We present measurements of the clustering properties of a sample of infrared (IR) bright dust-obscured galaxies (DOGs). Combining 125 deg(2) of wide and deep optical images obtained with the Hyper Suprime-Cam on the Subaru Telescope and all-sky mid-IR images taken with Wide-Field Infrared Survey Explorer, we have discovered 4367 IR-bright DOGs with (i - [22])(AB) > 7.0 and flux density at 22 mu m > 1.0 mJy. We calculate the angular autocorrelation function (ACF) for a uniform subsample of 1411 DOGs with 3.0 mJy < flux (22 mu m) < 5.0 mJy and i(AB) < 24.0. The ACF of our DOG subsample is well-fit with a single power law, w(theta) = (0.010 +/- 0.003)theta(-0.9), where theta is in degrees. The correlation amplitude of IR-bright DOGs is larger than that of IR-faint DOGs, which reflects a flux dependence of the DOG clustering, as suggested by Brodwin et al. We assume that the redshift distribution for our DOG sample is Gaussian, and consider two cases: (1) the redshift distribution is the same as IR-faint DOGs with flux at 22 mu m < 1.0 mJy, mean and sigma z = 1.99 +/- 0.45, and (2) z = 1.19 +/- 0.30, as inferred from their photometric redshifts. The inferred correlation length of IR-bright DOGs is r(0) = 12.0 +/- 2.0 and 10.3 +/- 1.7 h(-1) Mpc, respectively. IR-bright DOGs reside in massive dark matter halos with a mass of log [ M-h /(h(-1) M-circle dot)] = 13.57(-0.55)(+0.50) and 13.65(-0.52)(+0.45) in the two cases, respectively.