2019/10/31 by F. Bianchini, W. L. K. Wu, P. A. R. Ade +78
Physics and Astronomy · #Anisotropy #Astronomy #Astrophysics #Baryon #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #Dark energy #Galaxies: Formation, Evolution, Phenomena #Galaxy #Lambda #Omega #Particle physics #Physics #Planck #Quantum mechanics #Radio Astronomy Observations and Technology #Redshift #Sigma #Spectral density #Statistics #Weak gravitational lensing #astro-ph.CO
paper · pdf · doi:10.3847/1538-4357/ab6082
16 pages, 8 figures, 3 tables, updated to match the version published on ApJ
openalex publication_date 2020/01/10 · openalex created_date 2020/01/23 · arxiv created 2020/02/04 · arxiv updated 2020/02/05 · openalex updated_date 2026/08/06
Abstract We present cosmological constraints based on the cosmic microwave background (CMB) lensing potential power spectrum measurement from the recent 500 deg 2 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 . Jointly fitting with BAO data, we find , , and , up to 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 and the sum of the neutrino masses to be 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.