A Direct Measurement of the Linear Bias of Mid-infrared-selected Quasars at z ap 1 Using Cosmic Microwave Background Lensing
Author
Geach, J.~E.
Hickox, R.~C.
Bleem, L.~E.
Brodwin, M.
Holder, G.~P.
Aird, K.~A.
Benson, B.~A.
Bhattacharya, S.
Carlstrom, J.~E.
Chang, C.~L.
Cho, H.-M.
Crawford, T.~M.
Crites, A.~T.
de Haan, T.
Dobbs, M.~A.
Dudley, J.
George, E.~M.
Hainline, K.~N.
Halverson, N.~W.
Holzapfel, W.~L.
Hoover, S.
Hou, Z.
Hrubes, J.~D.
Keisler, R.
Knox, L.
Lee, A.~T.
Leitch, E.~M.
Lueker, M.
Luong-Van, D.
Marrone, D.~P.
McMahon, J.~J.
Mehl, J.
Meyer, S.~S.
Millea, M.
Mohr, J.~J.
Montroy, T.~E.
Myers, A.~D.
Padin, S.
Plagge, T.
Pryke, C.
Reichardt, C.~L.
Ruhl, J.~E.
Sayre, J.~T.
Schaffer, K.~K.
Shaw, L.
Shirokoff, E.
Spieler, H.~G.
Staniszewski, Z.
Stark, A.~A.
Story, K.~T.
van Engelen, A.
Vanderlinde, K.
Vieira, J.~D.
Williamson, R.
Zahn, O.
Attention
2299/20566
Abstract
We measure the cross-power spectrum of the projected mass density as traced by the convergence of the cosmic microwave background lensing field from the South Pole Telescope (SPT) and a sample of Type 1 and 2 (unobscured and obscured) quasars at langzrang ~ 1 selected with the Wide-field Infrared Survey Explorer, over 2500 deg2. The cross-power spectrum is detected at ≈7σ, and we measure a linear bias b = 1.61 ± 0.22, consistent with clustering analyses. Using an independent lensing map, derived from Planck observations, to measure the cross-spectrum, we find excellent agreement with the SPT analysis. The bias of the combined sample of Type 1 and 2 quasars determined in this work is similar to that previously determined for Type 1 quasars alone; we conclude that obscured and unobscured quasars trace the matter field in a similar way. This result has implications for our understanding of quasar unification and evolution schemes.