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      A Measurement of the Cosmic Microwave Background Lensing Potential and Power Spectrum from 500 deg\(^2\) of SPTpol Temperature and Polarization Data

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          Abstract

          We present a measurement of the cosmic microwave background (CMB) lensing potential using 500 deg\(^2\) of 150 GHz data from the SPTpol receiver on the South Pole Telescope. The lensing potential is reconstructed with signal-to-noise per mode greater than unity at lensing multipoles \(L \lesssim 250\), using a quadratic estimator on a combination of CMB temperature and polarization maps. We report measurements of the lensing potential power spectrum in the multipole range of \(100< L < 2000\) from sets of temperature-only, polarization-only, and minimum-variance estimators. We measure the lensing amplitude by taking the ratio of the measured spectrum to the expected spectrum from the best-fit \(\Lambda\)CDM model to the \(\textit{Planck}\) 2015 TT+lowP+lensing dataset. For the minimum-variance estimator, we find \(A_{\rm{MV}} = 0.944 \pm 0.058{\rm (Stat.)}\pm0.025{\rm (Sys.)}\); restricting to only polarization data, we find \(A_{\rm{POL}} = 0.906 \pm 0.090 {\rm (Stat.)} \pm 0.040 {\rm (Sys.)}\). Considering statistical uncertainties alone, this is the most precise polarization-only lensing amplitude constraint to date (10.1 \(\sigma\)), and is more precise than our temperature-only constraint. We perform null tests and consistency checks and find no evidence for significant contamination.

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          IMPACT OF CLUSTER PHYSICS ON THE SUNYAEV-ZEL'DOVICH POWER SPECTRUM

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            A MEASUREMENT OF GRAVITATIONAL LENSING OF THE MICROWAVE BACKGROUND USING SOUTH POLE TELESCOPE DATA

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              Detection of the Power Spectrum of Cosmic Microwave Background Lensing by the Atacama Cosmology Telescope

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                Author and article information

                Journal
                14 May 2019
                Article
                1905.05777
                a9571788-1e7c-447f-87d2-c4477cddaf17

                http://arxiv.org/licenses/nonexclusive-distrib/1.0/

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                Custom metadata
                18 pages, 8 figures
                astro-ph.CO

                Cosmology & Extragalactic astrophysics
                Cosmology & Extragalactic astrophysics

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