Planck 2018 results. VIII. Gravitational lensing
Creators: name: Planck Collaboration
name: Aghanim, N.
name: Akrami, Y.
name: Ashdown, M.
name: Aumont, J.
name: Baccigalupi, C.
name: Ballardini, M.
name: Banday, A. J.
name: Barreiro, R. B.
name: Bartolo, N.
name: Basak, S.
name: Benabed, K.
name: Bernard, J. -P.
name: Bersanelli, M.
name: Bielewicz, P.
name: Bock, J. J.
name: Bond, J. R.
name: Borrill, J.
name: Bouchet, F. R.
name: Boulanger, F.
name: Bucher, M.
name: Burigana, C.
name: Calabrese, E.
name: Cardoso, J. -F.
name: Carron, J.
name: Challinor, A.
name: Chiang, H. C.
name: Colombo, L. P. L.
name: Combet, C.
name: Crill, B. P.
name: Cuttaia, F.
name: de Bernardis, P.
name: de Zotti, G.
name: Delabrouille, J.
name: Di Valentino, E.
name: Diego, J. M.
name: Doré, O.
name: Douspis, M.
name: Ducout, A.
name: Dupac, X.
name: Efstathiou, G.
name: Elsner, F.
name: Enßlin, T. A.
name: Eriksen, H. K.
name: Fantaye, Y.
name: Fernandez-Cobos, R.
name: Forastieri, F.
name: Frailis, M.
name: Fraisse, A. A.
name: Franceschi, E.
name: Frolov, A.
name: Galeotta, S.
name: Galli, S.
name: Ganga, K.
name: Génova-Santos, R. T.
name: Gerbino, M.
name: Ghosh, T.
name: González-Nuevo, J.
name: Górski, K. M.
name: Gratton, S.
name: Gruppuso, A.
name: Gudmundsson, J. E.
name: Hamann, J.
name: Handley, W.
name: Hansen, F. K.
name: Herranz, D.
name: Hivon, E.
name: Huang, Z.
name: Jaffe, A. H.
name: Jones, W. C.
name: Karakci, A.
name: Keihänen, E.
name: Keskitalo, R.
name: Kiiveri, K.
name: Kim, J.
name: Knox, L.
name: Krachmalnicoff, N.
name: Kunz, M.
name: Kurki-Suonio, H.
name: Lagache, G.
name: Lamarre, J. -M.
name: Lasenby, A.
name: Lattanzi, M.
name: Lawrence, C. R.
name: Jeune, M. Le
name: Levrier, F.
name: Lewis, A.
name: Liguori, M.
name: Lilje, P. B.
name: Lindholm, V.
name: López-Caniego, M.
name: Lubin, P. M.
name: Ma, Y. -Z.
name: Macías-Pérez, J. F.
name: Maggio, G.
name: Maino, D.
name: Mandolesi, N.
name: Mangilli, A.
name: Marcos-Caballero, A.
name: Maris, M.
name: Martin, P. G.
name: Martínez-González, E.
name: Matarrese, S.
name: Mauri, N.
name: McEwen, J. D.
name: Melchiorri, A.
name: Mennella, A.
name: Migliaccio, M.
name: Miville-Deschênes, M. -A.
name: Molinari, D.
name: Moneti, A.
name: Montier, L.
name: Morgante, G.
name: Moss, A.
name: Natoli, P.
name: Pagano, L.
name: Paoletti, D.
name: Partridge, B.
name: Patanchon, G.
name: Perrotta, F.
name: Pettorino, V.
name: Piacentini, F.
name: Polastri, L.
name: Polenta, G.
name: Puget, J. -L.
name: Rachen, J. P.
name: Reinecke, M.
name: Remazeilles, M.
name: Renzi, A.
name: Rocha, G.
name: Rosset, C.
name: Roudier, G.
name: Rubiño-Martín, J. A.
name: Ruiz-Granados, B.
name: Salvati, L.
name: Sandri, M.
name: Savelainen, M.
name: Scott, D.
name: Sirignano, C.
name: Sunyaev, R.
name: Suur-Uski, A. -S.
name: Tauber, J. A.
name: Tavagnacco, D.
name: Tenti, M.
name: Toffolatti, L.
name: Tomasi, M.
name: Trombetti, T.
name: Valiviita, J.
name: Van Tent, B.
name: Vielva, P.
name: Villa, F.
name: Vittorio, N.
name: Wandelt, B. D.
name: Wehus, I. K.
name: White, M.
name: White, S. D. M.
name: Zacchei, A.
name: Zonca, A.
Publisher: name: arXiv
Year: 2018
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We present measurements of the cosmic microwave background (CMB) lensing potential using the final $\textit{Planck}$ 2018 temperature and polarization data. We increase the significance of the detection of lensing in the polarization maps from $5\,σ$ to $9\,σ$. Combined with temperature, lensing is detected at $40\,σ$. We present an extensive set of tests of the robustness of the lensing-potential power spectrum, and construct a minimum-variance estimator likelihood over lensing multipoles $8 \le L \le 400$. We find good consistency between lensing constraints and the results from the $\textit{Planck}$ CMB power spectra within the $\rm{ΛCDM}$ model. Combined with baryon density and other weak priors, the lensing analysis alone constrains $σ_8 Ω_{\rm m}^{0.25}=0.589\pm 0.020$ ($1\,σ$ errors). Also combining with baryon acoustic oscillation (BAO) data, we find tight individual parameter constraints, $σ_8=0.811\pm0.019$, $H_0=67.9_{-1.3}^{+1.2}\,\text{km}\,\text{s}^{-1}\,\rm{Mpc}^{-1}$, and $Ω_{\rm m}=0.303^{+0.016}_{-0.018}$. Combining with $\textit{Planck}$ CMB power spectrum data, we measure $σ_8$ to better than $1\,\%$ precision, finding $σ_8=0.811\pm 0.006$. We find consistency with the lensing results from the Dark Energy Survey, and give combined lensing-only parameter constraints that are tighter than joint results using galaxy clustering. Using $\textit{Planck}$ cosmic infrared background (CIB) maps we make a combined estimate of the lensing potential over $60\,\%$ of the sky with considerably more small-scale signal. We demonstrate delensing of the $\textit{Planck}$ power spectra, detecting a maximum removal of $40\,\%$ of the lensing-induced power in all spectra. The improvement in the sharpening of the acoustic peaks by including both CIB and the quadratic lensing reconstruction is detected at high significance (abridged).
description: Abstract abridged for arxiv submission. Lensing data products available at https://wiki.cosmos.esa.int/planck-legacy-archive/index.php/Lensing. Matches version accepted by A&amp;A, with minor updates from v1