CLUSTERING OF INTERMEDIATE LUMINOSITY X-RAY SELECTED AGN AT Z ∼ 3

We present the first clustering results of X-ray selected AGN at z similar to 3. Using Chandra X-ray imaging and UVR optical colors from MUSYC photometry in the ECDF-S field, we selected a sample of 58 z similar to 3 AGN candidates. From the optical data we also selected 1385 LBG at 2.8 < z < 3.8 with R < 25.5. We performed auto-correlation and cross-correlation analyses, and here we present results for the clustering amplitudes and dark matter halo masses of each sample. For the LBG we find a correlation length Of r(0,LBG) = 6.7 +/- 0.5 Mpc, implying a bias value of 3.5 +/- 0.3 and dark matter (DM) halo masses of log(M-min/M-circle dot) = 11.8 +/- 0.1. The AGN-LBG cross-correlation yields r(0,AGN-LBC) = 8.7 +/- 1.9 Mpc, implying for AGN at 2.8 < z 3.8 a bias value of 5.5 +/- 2.0 and DM halo masses of log(M-min/M-circle dot) = 12.6(-0.8)(+0.5). Evolution of dark matter halos in the Lambda CDM cosmology implies that today these z - 3 AGN are found in high inass galaxies with a typical luminosity 7(-2)(+4) L*.