A Direct Measurement of the Linear Bias of Mid-infrared-selected Quasars at z ap 1 Using Cosmic Microwave Background Lensing

J.~E. Geach; R.~C. Hickox; L.~E. Bleem; M. Brodwin; G.~P. Holder; K.~A. Aird; B.~A. Benson; S. Bhattacharya; J.~E. Carlstrom; C.~L. Chang; H.-M. Cho; T.~M. Crawford; A.~T. Crites; T. de Haan; M.~A. Dobbs; J. Dudley; E.~M. George; K.~N. Hainline; N.~W. Halverson; W.~L. Holzapfel; S. Hoover; Z. Hou; J.~D. Hrubes; R. Keisler; L. Knox; A.~T. Lee; E.~M. Leitch; M. Lueker; D. Luong-Van; D.~P. Marrone; J.~J. McMahon; J. Mehl; S.~S. Meyer; M. Millea; J.~J. Mohr; T.~E. Montroy; A.~D. Myers; S. Padin; T. Plagge; C. Pryke; C.~L. Reichardt; J.~E. Ruhl; J.~T. Sayre; K.~K. Schaffer; L. Shaw; E. Shirokoff; H.~G. Spieler; Z. Staniszewski; A.~A. Stark; K.~T. Story; A. van Engelen; K. Vanderlinde; J.~D. Vieira; R. Williamson; O. Zahn

doi:10.1088/2041-8205/776/2/L41

A Direct Measurement of the Linear Bias of Mid-infrared-selected Quasars at z ap 1 Using Cosmic Microwave Background Lensing

J.~E. Geach, R.~C. Hickox, L.~E. Bleem, M. Brodwin, G.~P. Holder, K.~A. Aird, B.~A. Benson, S. Bhattacharya, J.~E. Carlstrom, C.~L. Chang, H.-M. Cho, T.~M. Crawford, A.~T. Crites, T. de Haan, M.~A. Dobbs, J. Dudley, E.~M. George, K.~N. Hainline, N.~W. Halverson, W.~L. HolzapfelS. Hoover, Z. Hou, J.~D. Hrubes, R. Keisler, L. Knox, A.~T. Lee, E.~M. Leitch, M. Lueker, D. Luong-Van, D.~P. Marrone, J.~J. McMahon, J. Mehl, S.~S. Meyer, M. Millea, J.~J. Mohr, T.~E. Montroy, A.~D. Myers, S. Padin, T. Plagge, C. Pryke, C.~L. Reichardt, J.~E. Ruhl, J.~T. Sayre, K.~K. Schaffer, L. Shaw, E. Shirokoff, H.~G. Spieler, Z. Staniszewski, A.~A. Stark, K.~T. Story, A. van Engelen, K. Vanderlinde, J.~D. Vieira, R. Williamson, O. Zahn

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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.

Original language	English
Number of pages	6
Journal	Astrophysical Journal Letters
Volume	776
Issue number	2
DOIs	https://doi.org/10.1088/2041-8205/776/2/L41
Publication status	Published - 20 Oct 2013

Keywords

cosmology: observations

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10.1088/2041-8205/776/2/L41

Geach_2013_ApJL_776_L41-aam
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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., ... Zahn, O. (2013). A Direct Measurement of the Linear Bias of Mid-infrared-selected Quasars at z ap 1 Using Cosmic Microwave Background Lensing. Astrophysical Journal Letters, 776(2). https://doi.org/10.1088/2041-8205/776/2/L41

@article{7ee3b9f999c84e598416c5c27dea8710,

title = "A Direct Measurement of the Linear Bias of Mid-infrared-selected Quasars at z ap 1 Using Cosmic Microwave Background Lensing",

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 \textasciitilde{} 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.",

keywords = "cosmology: observations",

author = "J.\textasciitilde{}E. Geach and R.\textasciitilde{}C. Hickox and L.\textasciitilde{}E. Bleem and M. Brodwin and G.\textasciitilde{}P. Holder and K.\textasciitilde{}A. Aird and B.\textasciitilde{}A. Benson and S. Bhattacharya and J.\textasciitilde{}E. Carlstrom and C.\textasciitilde{}L. Chang and H.-M. Cho and T.\textasciitilde{}M. Crawford and A.\textasciitilde{}T. Crites and \{de Haan\}, T. and M.\textasciitilde{}A. Dobbs and J. Dudley and E.\textasciitilde{}M. George and K.\textasciitilde{}N. Hainline and N.\textasciitilde{}W. Halverson and W.\textasciitilde{}L. Holzapfel and S. Hoover and Z. Hou and J.\textasciitilde{}D. Hrubes and R. Keisler and L. Knox and A.\textasciitilde{}T. Lee and E.\textasciitilde{}M. Leitch and M. Lueker and D. Luong-Van and D.\textasciitilde{}P. Marrone and J.\textasciitilde{}J. McMahon and J. Mehl and S.\textasciitilde{}S. Meyer and M. Millea and J.\textasciitilde{}J. Mohr and T.\textasciitilde{}E. Montroy and A.\textasciitilde{}D. Myers and S. Padin and T. Plagge and C. Pryke and C.\textasciitilde{}L. Reichardt and J.\textasciitilde{}E. Ruhl and J.\textasciitilde{}T. Sayre and K.\textasciitilde{}K. Schaffer and L. Shaw and E. Shirokoff and H.\textasciitilde{}G. Spieler and Z. Staniszewski and A.\textasciitilde{}A. Stark and K.\textasciitilde{}T. Story and \{van Engelen\}, A. and K. Vanderlinde and J.\textasciitilde{}D. Vieira and R. Williamson and O. Zahn",

year = "2013",

month = oct,

day = "20",

doi = "10.1088/2041-8205/776/2/L41",

language = "English",

volume = "776",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "American Astronomical Society",

number = "2",

}

Geach, JE, Hickox, RC, Bleem, LE, Brodwin, M, Holder, GP, Aird, KA, Benson, BA, Bhattacharya, S, Carlstrom, JE, Chang, CL, Cho, H-M, Crawford, TM, Crites, AT, de Haan, T, Dobbs, MA, Dudley, J, George, EM, Hainline, KN, Halverson, NW, Holzapfel, WL, Hoover, S, Hou, Z, Hrubes, JD, Keisler, R, Knox, L, Lee, AT, Leitch, EM, Lueker, M, Luong-Van, D, Marrone, DP, McMahon, JJ, Mehl, J, Meyer, SS, Millea, M, Mohr, JJ, Montroy, TE, Myers, AD, Padin, S, Plagge, T, Pryke, C, Reichardt, CL, Ruhl, JE, Sayre, JT, Schaffer, KK, Shaw, L, Shirokoff, E, Spieler, HG, Staniszewski, Z, Stark, AA, Story, KT, van Engelen, A, Vanderlinde, K, Vieira, JD, Williamson, R & Zahn, O 2013, 'A Direct Measurement of the Linear Bias of Mid-infrared-selected Quasars at z ap 1 Using Cosmic Microwave Background Lensing', Astrophysical Journal Letters, vol. 776, no. 2. https://doi.org/10.1088/2041-8205/776/2/L41

TY - JOUR

T1 - A Direct Measurement of the Linear Bias of Mid-infrared-selected Quasars at z ap 1 Using Cosmic Microwave Background Lensing

AU - Geach, J.~E.

AU - Hickox, R.~C.

AU - Bleem, L.~E.

AU - Brodwin, M.

AU - Holder, G.~P.

AU - Aird, K.~A.

AU - Benson, B.~A.

AU - Bhattacharya, S.

AU - Carlstrom, J.~E.

AU - Chang, C.~L.

AU - Cho, H.-M.

AU - Crawford, T.~M.

AU - Crites, A.~T.

AU - de Haan, T.

AU - Dobbs, M.~A.

AU - Dudley, J.

AU - George, E.~M.

AU - Hainline, K.~N.

AU - Halverson, N.~W.

AU - Holzapfel, W.~L.

AU - Hoover, S.

AU - Hou, Z.

AU - Hrubes, J.~D.

AU - Keisler, R.

AU - Knox, L.

AU - Lee, A.~T.

AU - Leitch, E.~M.

AU - Lueker, M.

AU - Luong-Van, D.

AU - Marrone, D.~P.

AU - McMahon, J.~J.

AU - Mehl, J.

AU - Meyer, S.~S.

AU - Millea, M.

AU - Mohr, J.~J.

AU - Montroy, T.~E.

AU - Myers, A.~D.

AU - Padin, S.

AU - Plagge, T.

AU - Pryke, C.

AU - Reichardt, C.~L.

AU - Ruhl, J.~E.

AU - Sayre, J.~T.

AU - Schaffer, K.~K.

AU - Shaw, L.

AU - Shirokoff, E.

AU - Spieler, H.~G.

AU - Staniszewski, Z.

AU - Stark, A.~A.

AU - Story, K.~T.

AU - van Engelen, A.

AU - Vanderlinde, K.

AU - Vieira, J.~D.

AU - Williamson, R.

AU - Zahn, O.

PY - 2013/10/20

Y1 - 2013/10/20

N2 - 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.

AB - 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.

KW - cosmology: observations

U2 - 10.1088/2041-8205/776/2/L41

DO - 10.1088/2041-8205/776/2/L41

M3 - Article

SN - 2041-8205

VL - 776

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 2

ER -

A Direct Measurement of the Linear Bias of Mid-infrared-selected Quasars at z ap 1 Using Cosmic Microwave Background Lensing

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