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A measurement of the correlation of galaxy surveys with CMB lensing convergence maps from the south pole telescope

  • L. E. Bleem
  • , A. Van Engelen
  • , G. P. Holder
  • , K. A. Aird
  • , R. Armstrong
  • , M. L N Ashby
  • , M. R. Becker
  • , B. A. Benson
  • , T. Biesiadzinski
  • , M. Brodwin
  • , M. T. Busha
  • , J. E. Carlstrom
  • , C. L. Chang
  • , H. M. Cho
  • , T. M. Crawford
  • , A. T. Crites
  • , T. De Haan
  • , S. Desai
  • , M. A. Dobbs
  • , O. Doré
  • J. Dudley, J. E. Geach, E. M. George, M. D. Gladders, A. H. Gonzalez, N. W. Halverson, N. Harrington, F. W. High, B. P. Holden, W. L. Holzapfel, S. Hoover, J. D. Hrubes, M. Joy, R. Keisler, L. Knox, A. T. Lee, E. M. Leitch, M. Lueker, D. Luong-Van, D. P. Marrone, J. Martinez-Manso, J. J. McMahon, J. Mehl, S. S. Meyer, J. J. Mohr, T. E. Montroy, T. Natoli, S. Padin, T. Plagge, C. Pryke, C. L. Reichardt, A. Rest, J. E. Ruhl, B. R. Saliwanchik, J. T. Sayre, K. K. Schaffer, L. Shaw, E. Shirokoff, H. G. Spieler, B. Stalder, S. A. Stanford, Z. Staniszewski, A. A. Stark, D. Stern, K. Story, A. Vallinotto, K. Vanderlinde, J. D. Vieira, R. H. Wechsler, R. Williamson, O. Zahn

Research output: Contribution to journalArticlepeer-review

Abstract

We compare cosmic microwave background lensing convergence maps derived from South Pole Telescope (SPT) data with galaxy survey data from the Blanco Cosmology Survey, WISE, and a new large Spitzer/IRAC field designed to overlap with the SPT survey. Using optical and infrared catalogs covering between 17 and 68deg2 of sky, we detect a correlation between the SPT convergence maps and each of the galaxy density maps at >4σ, with zero correlation robustly ruled out in all cases. The amplitude and shape of the cross-power spectra are in good agreement with theoretical expectations and the measured galaxy bias is consistent with previous work. The detections reported here utilize a small fraction of the full 2500deg2 SPT survey data and serve as both a proof of principle of the technique and an illustration of the potential of this emerging cosmological probe.

Original languageEnglish (US)
Article numberL9
JournalAstrophysical Journal Letters
Volume753
Issue number1
DOIs
StatePublished - Jul 1 2012

Keywords

  • cosmic background radiation
  • galaxies: structure

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