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Constraints on Cosmological Parameters from the 500 deg² SPTPOL Lensing Power Spectrum

Bianchini, F. and Moran, C. Corbett and Crites, A. T. and Padin, S. (2020) Constraints on Cosmological Parameters from the 500 deg² SPTPOL Lensing Power Spectrum. Astrophysical Journal, 888 (2). Art. No. 119. ISSN 1538-4357. doi:10.3847/1538-4357/ab6082.

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We present cosmological constraints based on the cosmic microwave background (CMB) lensing potential power spectrum measurement from the recent 500 deg² SPTPOL survey, the most precise CMB lensing measurement from the ground to date. We fit a flat ΛCDM model to the reconstructed lensing power spectrum alone and in addition with other data sets: baryon acoustic oscillations (BAO), as well as primary CMB spectra from Planck and SPTPOL. The cosmological constraints based on SPTPOL and Planck lensing band powers are in good agreement when analyzed alone and in combination with Planck full-sky primary CMB data. With weak priors on the baryon density and other parameters, the SPTPOL CMB lensing data alone provide a 4% constraint on σ₈Ω^(0.25)_m = 0.593 ± 0.025. Jointly fitting with BAO data, we find σ₈ = 0.779±0.023, Ω_m = 0.368^(+0.032)_(−0.037), and H₀ = 72.0^(+2.1)_(−2.5)kms⁻¹ Mpc⁻¹, up to 2σ away from the central values preferred by Planck lensing + BAO. However, we recover good agreement between SPTPOL and Planck when restricting the analysis to similar scales. We also consider single-parameter extensions to the flat ΛCDM model. The SPTPOL lensing spectrum constrains the spatial curvature to be Ω_K = −0.0007±0.0025 and the sum of the neutrino masses to be ∑m_ν < 0.23 eV at 95% C.L. (with Planck primary CMB and BAO data), in good agreement with the Planck lensing results. With the differences in the signal-to-noise ratio of the lensing modes and the angular scales covered in the lensing spectra, this analysis represents an important independent check on the full-sky Planck lensing measurement.

Item Type:Article
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URLURL TypeDescription Paper
Bianchini, F.0000-0003-4847-3483
Moran, C. Corbett0000-0003-2088-7465
Additional Information:© 2020 The American Astronomical Society. Received 2019 October 16; revised 2019 December 5; accepted 2019 December 8; published 2020 January 16. S.P.T. is supported by the National Science Foundation through grant PLR-1248097. Partial support is also provided by the NSF Physics Frontier Center grant PHY-1125897 to the Kavli Institute of Cosmological Physics at the University of Chicago, the Kavli Foundation, and the Gordon and Betty Moore Foundation grant GBMF 947. This research used resources of the National Energy Research Scientific Computing Center (NERSC), a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy under contract No. DE-AC02-05CH11231. The Melbourne group acknowledges support from the University of Melbourne and an Australian Research Council's Future Fellowship (FT150100074). Work at Argonne National Lab is supported by UChicago Argonne LLC, Operator of Argonne National Laboratory (Argonne). Argonne, a U.S. Department of Energy Office of Science Laboratory, is operated under contract No. DE-AC02-06CH11357. We also acknowledge support from the Argonne Center for Nanoscale Materials.
Group:TAPIR, Walter Burke Institute for Theoretical Physics
Funding AgencyGrant Number
Kavli FoundationUNSPECIFIED
Gordon and Betty Moore FoundationGBMF 947
Department of Energy (DOE)DE-AC02-05CH11231
University of MelbourneUNSPECIFIED
Australian Research CouncilFT150100074
Department of Energy (DOE)DE-AC02-06CH11357
Argonne Center for Nanoscale MaterialsUNSPECIFIED
Subject Keywords:Cosmological parameters; Weak gravitational lensing; Cosmic microwave background radiation
Issue or Number:2
Classification Code:Unified Astronomy Thesaurus concepts: Cosmological parameters (339); Weak gravitational lensing (1797); Cosmic microwave background radiation (322)
Record Number:CaltechAUTHORS:20200116-102453008
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Official Citation:F. Bianchini et al 2020 ApJ 888 119
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:100761
Deposited By: Tony Diaz
Deposited On:16 Jan 2020 18:43
Last Modified:16 Nov 2021 17:56

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