CMB lensing from Planck PR4 maps

By J. Carron, M. Mirmelstein, A. Lewis. Journal of Cosmology and Astroparticle Physics, 2022

271 citations recorded by the source corpus.

We reconstruct the Cosmic Microwave Background (CMB) lensing potential on the latest Planck CMB PR4 (NPIPE) maps, which include slightly more data than the 2018 PR3 release, and implement quadratic estimators using more optimal filtering. We increase the reconstruction signal to noise by almost 20%, constraining the amplitude of the CMB-marginalized lensing power spectrum in units of the Planck 2018 best-fit to 1.004 ± 0.024 (68% limits), which is the tightest constraint on the CMB lensing power spectrum to date. For a base ΛCDM cosmology we find σ 8 Ωm 0.25 = 0.599 ± 0.016 from CMB lensing alone in combination with weak priors and element abundance observations. Combination with baryon acoustic oscillation data gives tight 68% constraints on individual ΛCDM parameters σ m = 0.814 ± 0.016, H 0 = 68.1+1.0 -1.1 km s-1 Mpc-1, Ωm = 0.313+0.014 -0.016. Planck polarized maps alone now constrain the lensing power to 7%.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/4c716257f7ea550b7fff39f5ad78ab3a50174fd8

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Citations in the corpus

• The Atacama Cosmology Telescope: A Measurement of the DR6 CMB Lensing Power Spectrum and Its Implications for Structure Growth (2023, methodology): “1.004± 0.024 (Carron et al. 2022).36 For measurements performed purely with temperature and polarization we obtain the lensing amplitudes of Alens = 1.009 ± 0.037 and Alens = 1.034 ± 0.049, respectively.”
• Cosmological parameters derived from the final Planck data release (PR4) (2023, methodology): “We repeat the analysis using more conservative Galactic masks reducing the sky fraction at each frequency by 5% (labelled “ XL ”) or 10% (labelled “ L ”) with respect to our baseline (“ XXL ”, which masks, 20%, 30%, and 45% at 100, 143, and 217 GHz, respectively; see Sect.”
• The Atacama Cosmology Telescope: DR6 Gravitational Lensing Map and Cosmological Parameters (2023, methodology): “It should be noted that this preference for negative curvature weakens in the recent Planck NPIPE re-analysis of CMB anisotropies (Rosenberg et al. 2022).”