Planck 2018 results. VI. Cosmological parameters
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: Battye, R.
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: Butler, R. C.
name: Calabrese, E.
name: Cardoso, J. -F.
name: Carron, J.
name: Challinor, A.
name: Chiang, H. C.
name: Chluba, J.
name: Colombo, L. P. L.
name: Combet, C.
name: Contreras, D.
name: Crill, B. P.
name: Cuttaia, F.
name: de Bernardis, P.
name: de Zotti, G.
name: Delabrouille, J.
name: Delouis, J. -M.
name: Di Valentino, E.
name: Diego, J. M.
name: Doré, O.
name: Douspis, M.
name: Ducout, A.
name: Dupac, X.
name: Dusini, S.
name: Efstathiou, G.
name: Elsner, F.
name: Enßlin, T. A.
name: Eriksen, H. K.
name: Fantaye, Y.
name: Farhang, M.
name: Fergusson, J.
name: Fernandez-Cobos, R.
name: Finelli, F.
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: Hildebrandt, S. R.
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: Kisner, T. S.
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: Lemos, P.
name: Lesgourgues, J.
name: Levrier, F.
name: Lewis, A.
name: Liguori, M.
name: Lilje, P. B.
name: Lilley, M.
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: Martinelli, M.
name: Martínez-González, E.
name: Matarrese, S.
name: Mauri, N.
name: McEwen, J. D.
name: Meinhold, P. R.
name: Melchiorri, A.
name: Mennella, A.
name: Migliaccio, M.
name: Millea, M.
name: Mitra, S.
name: Miville-Deschênes, M. -A.
name: Molinari, D.
name: Montier, L.
name: Morgante, G.
name: Moss, A.
name: Natoli, P.
name: Nørgaard-Nielsen, H. U.
name: Pagano, L.
name: Paoletti, D.
name: Partridge, B.
name: Patanchon, G.
name: Peiris, H. V.
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: Shellard, E. P. S.
name: Sirignano, C.
name: Sirri, G.
name: Spencer, L. D.
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: Valenziano, L.
name: Valiviita, J.
name: Van Tent, B.
name: Vibert, L.
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 cosmological parameter results from the final full-mission Planck measurements of the CMB anisotropies. We find good consistency with the standard spatially-flat 6-parameter $Λ$CDM cosmology having a power-law spectrum of adiabatic scalar perturbations (denoted "base $Λ$CDM" in this paper), from polarization, temperature, and lensing, separately and in combination. A combined analysis gives dark matter density $Ω_c h^2 = 0.120\pm 0.001$, baryon density $Ω_b h^2 = 0.0224\pm 0.0001$, scalar spectral index $n_s = 0.965\pm 0.004$, and optical depth $τ= 0.054\pm 0.007$ (in this abstract we quote $68\,\%$ confidence regions on measured parameters and $95\,\%$ on upper limits). The angular acoustic scale is measured to $0.03\,\%$ precision, with $100θ_*=1.0411\pm 0.0003$. These results are only weakly dependent on the cosmological model and remain stable, with somewhat increased errors, in many commonly considered extensions. Assuming the base-$Λ$CDM cosmology, the inferred late-Universe parameters are: Hubble constant $H_0 = (67.4\pm 0.5)$km/s/Mpc; matter density parameter $Ω_m = 0.315\pm 0.007$; and matter fluctuation amplitude $σ_8 = 0.811\pm 0.006$. We find no compelling evidence for extensions to the base-$Λ$CDM model. Combining with BAO we constrain the effective extra relativistic degrees of freedom to be $N_{\rm eff} = 2.99\pm 0.17$, and the neutrino mass is tightly constrained to $\sum m_ν&lt; 0.12$eV. The CMB spectra continue to prefer higher lensing amplitudes than predicted in base -$Λ$CDM at over $2\,σ$, which pulls some parameters that affect the lensing amplitude away from the base-$Λ$CDM model; however, this is not supported by the lensing reconstruction or (in models that also change the background geometry) BAO data. (Abridged)
description: 73 pages; Updated with published reionization result corrigendum on p59. Parameter tables and chains available at https://wiki.cosmos.esa.int/planck-legacy-archive/index.php/Cosmological_Parameters