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Title: A DIRECT MEASUREMENT OF THE LINEAR BIAS OF MID-INFRARED-SELECTED QUASARS AT z ≈ 1 USING COSMIC MICROWAVE BACKGROUND LENSING

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 (z) ∼ 1 selected with the Wide-field Infrared Survey Explorer, over 2500 deg{sup 2}. 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.
Authors:
 [1] ; ;  [2] ; ; ; ; ; ; ;  [3] ;  [4] ; ; ; ;  [5] ;  [6] ;  [7] ; ;  [8] ;  [9] more »; « less
  1. Centre for Astrophysics Research, Science and Technology Research Institute, University of Hertfordshire, Hatfield, AL10 9AB (United Kingdom)
  2. Department of Physics and Astronomy, Dartmouth College, 6127 Wilder Laboratory, Hanover, NH 03755 (United States)
  3. Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637 (United States)
  4. Department of Physics and Astronomy, University of Missouri, Kansas City, MO 64110 (United States)
  5. Department of Physics, McGill University, Montreal, Quebec H3A 2T8 (Canada)
  6. University of Chicago, Chicago, IL 60637 (United States)
  7. NIST Quantum Devices Group, Boulder, CO 80305 (United States)
  8. Department of Physics, University of California, Berkeley, CA 94720 (United States)
  9. Department of Astrophysical and Planetary Sciences and Department of Physics, University of Colorado, Boulder, CO 80309 (United States)
Publication Date:
OSTI Identifier:
22215395
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 776; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BULK DENSITY; CONVERGENCE; COSMOLOGY; EVOLUTION; INFRARED SURVEYS; LENSES; MAPS; MASS; MATTER; QUASARS; RELICT RADIATION; SPECTRA; TELESCOPES