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Detection of the pairwise kinematic Sunyaev-Zel'dovich effect with BOSS DR11 and the Atacama Cosmology Telescope

  • F. De Bernardis
  • , S. Aiola
  • , E. M. Vavagiakis
  • , N. Battaglia
  • , M. D. Niemack
  • , J. Beall
  • , D. T. Becker
  • , J. R. Bond
  • , E. Calabrese
  • , H. Cho
  • , K. Coughlin
  • , R. Datta
  • , M. Devlin
  • , J. Dunkley
  • , R. Dunner
  • , S. Ferraro
  • , A. Fox
  • , P. A. Gallardo
  • , M. Halpern
  • , N. Hand
  • M. Hasselfield, S. W. Henderson, J. C. Hill, G. C. Hilton, M. Hilton, A. D. Hincks, R. Hlozek, J. Hubmayr, K. Huffenberger, J. P. Hughes, K. D. Irwin, B. J. Koopman, A. Kosowsky, D. Li, T. Louis, M. Lungu, M. S. Madhavacheril, L. Maurin, J. McMahon, K. Moodley, S. Naess, F. Nati, L. Newburgh, J. P. Nibarger, L. A. Page, B. Partridge, E. Schaan, B. L. Schmitt, N. Sehgal, J. Sievers, S. M. Simon, D. N. Spergel, S. T. Staggs, J. R. Stevens, R. J. Thornton, A. Van Engelen, J. Van Lanen, E. J. Wollack
  • Cornell University
  • University of Pittsburgh
  • Princeton University
  • National Institute of Standards and Technology
  • University of Toronto
  • University of Oxford
  • SLAC National Accelerator Laboratory
  • University of Michigan, Ann Arbor
  • University of Pennsylvania
  • Pontificia Universidad Católica de Chile
  • University of California at Berkeley
  • University of British Columbia
  • Pennsylvania State University
  • Columbia University
  • University of KwaZulu-Natal
  • University of Rome La Sapienza
  • Florida State University
  • Rutgers - The State University of New Jersey, New Brunswick
  • Sorbonne Université
  • Stony Brook University
  • Haverford College
  • National Institute for Theoretical Physics (NITheP)
  • West Chester University
  • NASA Goddard Space Flight Center

Research output: Contribution to journalArticlepeer-review

78 Scopus citations

Abstract

We present a new measurement of the kinematic Sunyaev-Zel'dovich effect using data from the Atacama Cosmology Telescope (ACT) and the Baryon Oscillation Spectroscopic Survey (BOSS). Using 600 square degrees of overlapping sky area, we evaluate the mean pairwise baryon momentum associated with the positions of 50,000 bright galaxies in the BOSS DR11 Large Scale Structure catalog. A non-zero signal arises from the large-scale motions of halos containing the sample galaxies. The data fits an analytical signal model well, with the optical depth to microwave photon scattering as a free parameter determining the overall signal amplitude. We estimate the covariance matrix of the mean pairwise momentum as a function of galaxy separation, using microwave sky simulations, jackknife evaluation, and bootstrap estimates. The most conservative simulation-based errors give signal-to-noise estimates between 3.6 and 4.1 for varying galaxy luminosity cuts. We discuss how the other error determinations can lead to higher signal-to-noise values, and consider the impact of several possible systematic errors. Estimates of the optical depth from the average thermal Sunyaev-Zel'dovich signal at the sample galaxy positions are broadly consistent with those obtained from the mean pairwise momentum signal.

Original languageEnglish
Article number008
JournalJournal of Cosmology and Astroparticle Physics
Volume2017
Issue number3
DOIs
StatePublished - Mar 7 2017

Keywords

  • CMBR experiments
  • Sunyaev-Zeldovich effect
  • galaxy surveys
  • hydrodynamical simulations

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