Year: 2017
Type: article
Abstract: We present a cosmic microwave background (CMB) lensing map produced from a linear combination of South Pole Telescope (SPT) and Planck temperature data. The 150 GHz temperature data from the 2500 deg2 SPT-SZ survey is combined with the Planck 143 GHz data in harmonic space to obtain a temperature map that has a broader ℓ coverage and less noise than either individual map. Using a quadratic estimator technique on this combined temperature map, we produce a map of the gravitational lensing potential projected along the line of sight. We measure the auto-spectrum of the lensing potential , and compare it to the theoretical prediction for a ΛCDM cosmology consistent with the Planck 2015 data set, finding a best-fit amplitude of . The null hypothesis of no lensing is rejected at a significance of 24σ. One important use of such a lensing potential map is in cross-correlations with other dark matter tracers. We demonstrate this cross-correlation in practice by calculating the cross-spectrum, , between the SPT+Planck lensing map and Wide-field Infrared Survey Explorer (WISE) galaxies. We fit to a power law of the form with a, L 0, and b fixed, and find , which is marginally lower, but in good agreement with , the best-fit amplitude for the cross-correlation of Planck-2015 CMB lensing and WISE galaxies over ∼67% of the sky. The lensing potential map presented here will be used for cross-correlation studies with the Dark Energy Survey, whose footprint nearly completely covers the SPT 2500 deg2 field.
Source: The Astrophysical Journal
Authors: Y. Omori, R. Chown, G. Simard, K. T. Story, K. Aylor, E. J. Baxter, B. A. Benson, L. E. Bleem, J. E. Carlstrom, C. L. Chang, H-M. Cho, T. M. Crawford, A. T. Crites, T. de Haan, M. A. Dobbs, W. B. Everett, E. M. George, N. W. Halverson, N. L. Harrington, G. P. Holder, Z. Hou, W. L. Holzapfel, J. D. Hrubes, L. Knox, A. T. Lee, E. M. Leitch, D. Luong-Van, A. Manzotti, D. P. Marrone, J. J. McMahon, S. S. Meyer, L. M. Mocanu, J. J. Mohr, T. Natoli, S. Padin, C. Pryke, C. L. Reichardt, J. E. Ruhl, J. T. Sayre, K. K. Schaffer, E. Shirokoff, Z. Staniszewski, A. A. Stark, K. Vanderlinde, J. D. Vieira, R. Williamson, O. Zahn
Institutions: Trottier Space Institute at McGill, McGill University, University of Chicago, Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, University of California, Davis, University of Pennsylvania, Fermi National Accelerator Laboratory, Argonne National Laboratory, SLAC National Accelerator Laboratory, California Institute of Technology, University of California, Berkeley, Canadian Institute for Advanced Research, University of Colorado Boulder, European Southern Observatory, University of Illinois Urbana-Champaign, Lawrence Berkeley National Laboratory, University of Arizona, University of Michigan, Max Planck Institute for Extraterrestrial Physics, Excellence Cluster Universe, Ludwig-Maximilians-Universität München, University of Toronto, University of Minnesota, The University of Melbourne, Case Western Reserve University, Art Institute of Chicago, School of the Art Institute of Chicago, Jet Propulsion Laboratory, Center for Astrophysics Harvard & Smithsonian
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Funders: National Science Foundation, U.S. Department of Energy, National Aeronautics and Space Administration, Gordon and Betty Moore Foundation, California Institute of Technology, University of Chicago, McGill University, Compute Canada, Ministère de l'Économie, de la Science et de l'Innovation - Québec, Canada Research Chairs, University of Illinois at Urbana-Champaign, Jet Propulsion Laboratory, University of California, Los Angeles, Natural Sciences and Engineering Research Council of Canada, Australian Research Council, High Energy Physics, Argonne National Laboratory
Awards: G102163711, G1055550527, G107546177, Center for Cosmological Physics, G1313983767, Leadership Class Scientific and Engineering Computing: Breaking Through the Limits, G1664757510, G262962599, Studying Inflation and Neutrinos with the Cosmic Microwave Background, G2952167421, G3075337988, Cosmological Research with the 10-meter South Pole Telescope, G4404904460, Sustained-Petascale In Action: Blue Waters Enabling Transformative Science And Engineering, G5560389312, G585908603, G6848031779, G8581667079, G969889393
OpenAlex ID: W2610346442