Planck 2015 results. XIII. Cosmological parameters
Abstract
We present results based on full-mission Planck observations of temperature and polarization anisotropies of the CMB. These data are consistent with the six-parameter inflationary LCDM cosmology. From the Planck temperature and lensing data, for this cosmology we find a Hubble constant, H0= (67.8 +/- 0.9) km/s/Mpc, a matter density parameter Omega_m = 0.308 +/- 0.012 and a scalar spectral index with n_s = 0.968 +/- 0.006. (We quote 68% errors on measured parameters and 95% limits on other parameters.) Combined with Planck temperature and lensing data, Planck LFI polarization measurements lead to a reionization optical depth of tau = 0.066 +/- 0.016. Combining Planck with other astrophysical data we find N_ eff = 3.15 +/- 0.23 for the effective number of relativistic degrees of freedom and the sum of neutrino masses is constrained to < 0.23 eV. Spatial curvature is found to be |Omega_K| < 0.005. For LCDM we find a limit on the tensor-to-scalar ratio of r <0.11 consistent with the B-mode constraints from an analysis of BICEP2, Keck Array, and Planck (BKP) data. Adding the BKP data leads to a tighter constraint of r < 0.09. We find no evidence for isocurvature perturbations or cosmic defects. The equation of state of dark energy is constrained to w = -1.006 +/- 0.045. Standard big bang nucleosynthesis predictions for the Planck LCDM cosmology are in excellent agreement with observations. We investigate annihilating dark matter and deviations from standard recombination, finding no evidence for new physics. The Planck results for base LCDM are in agreement with BAO data and with the JLA SNe sample. However the amplitude of the fluctuations is found to be higher than inferred from rich cluster counts and weak gravitational lensing. Apart from these tensions, the base LCDM cosmology provides an excellent description of the Planck CMB observations and many other astrophysical data sets.
Keywords
Cite
@article{arxiv.1502.01589,
title = {Planck 2015 results. XIII. Cosmological parameters},
author = {Planck Collaboration and P. A. R. Ade and N. Aghanim and M. Arnaud and M. Ashdown and J. Aumont and C. Baccigalupi and A. J. Banday and R. B. Barreiro and J. G. Bartlett and N. Bartolo and E. Battaner and R. Battye and K. Benabed and A. Benoit and A. Benoit-Levy and J. -P. Bernard and M. Bersanelli and P. Bielewicz and J. J. Bock and A. Bonaldi and L. Bonavera and J. R. Bond and J. Borrill and F. R. Bouchet and F. Boulanger and M. Bucher and C. Burigana and R. C. Butler and E. Calabrese and J. -F. Cardoso and A. Catalano and A. Challinor and A. Chamballu and R. -R. Chary and H. C. Chiang and J. Chluba and P. R. Christensen and S. Church and D. L. Clements and S. Colombi and L. P. L. Colombo and C. Combet and A. Coulais and B. P. Crill and A. Curto and F. Cuttaia and L. Danese and R. D. Davies and R. J. Davis and P. de Bernardis and A. de Rosa and G. de Zotti and J. Delabrouille and F. -X. Desert and E. Di Valentino and C. Dickinson and J. M. Diego and K. Dolag and H. Dole and S. Donzelli and O. Dore and M. Douspis and A. Ducout and J. Dunkley and X. Dupac and G. Efstathiou and F. Elsner and T. A. Ensslin and H. K. Eriksen and M. Farhang and J. Fergusson and F. Finelli and O. Forni and M. Frailis and A. A. Fraisse and E. Franceschi and A. Frejsel and S. Galeotta and S. Galli and K. Ganga and C. Gauthier and M. Gerbino and T. Ghosh and M. Giard and Y. Giraud-Heraud and E. Giusarma and E. Gjerlow and J. Gonzalez-Nuevo and K. M. Gorski and S. Gratton and A. Gregorio and A. Gruppuso and J. E. Gudmundsson and J. Hamann and F. K. Hansen and D. Hanson and D. L. Harrison and G. Helou and S. Henrot-Versille and C. Hernandez-Monteagudo and D. Herranz and S. R. Hildebrandt and E. Hivon and M. Hobson and W. A. Holmes and A. Hornstrup and W. Hovest and Z. Huang and K. M. Huffenberger and G. Hurier and A. H. Jaffe and T. R. Jaffe and W. C. Jones and M. Juvela and E. Keihanen and R. Keskitalo and T. S. Kisner and R. Kneissl and J. Knoche and L. Knox and M. Kunz and H. Kurki-Suonio and G. Lagache and A. Lahteenmaki and J. -M. Lamarre and A. Lasenby and M. Lattanzi and C. R. Lawrence and J. P. Leahy and R. Leonardi and J. Lesgourgues and F. Levrier and A. Lewis and M. Liguori and P. B. Lilje and M. Linden-Vornle and M. Lopez-Caniego and P. M. Lubin and J. F. Macias-Perez and G. Maggio and D. Maino and N. Mandolesi and A. Mangilli and A. Marchini and P. G. Martin and M. Martinelli and E. Martinez-Gonzalez and S. Masi and S. Matarrese and P. Mazzotta and P. McGehee and P. R. Meinhold and A. Melchiorri and J. -B. Melin and L. Mendes and A. Mennella and M. Migliaccio and M. Millea and S. Mitra and M. -A. Miville-Deschenes and A. Moneti and L. Montier and G. Morgante and D. Mortlock and A. Moss and D. Munshi and J. A. Murphy and P. Naselsky and F. Nati and P. Natoli and C. B. Netterfield and H. U. Norgaard-Nielsen and F. Noviello and D. Novikov and I. Novikov and C. A. Oxborrow and F. Paci and L. Pagano and F. Pajot and R. Paladini and D. Paoletti and B. Partridge and F. Pasian and G. Patanchon and T. J. Pearson and O. Perdereau and L. Perotto and F. Perrotta and V. Pettorino and F. Piacentini and M. Piat and E. Pierpaoli and D. Pietrobon and S. Plaszczynski and E. Pointecouteau and G. Polenta and L. Popa and G. W. Pratt and G. Prezeau and S. Prunet and J. -L. Puget and J. P. Rachen and W. T. Reach and R. Rebolo and M. Reinecke and M. Remazeilles and C. Renault and A. Renzi and I. Ristorcelli and G. Rocha and C. Rosset and M. Rossetti and G. Roudier and B. Rouille d'Orfeuil and M. Rowan-Robinson and J. A. Rubino-Martin and B. Rusholme and N. Said and V. Salvatelli and L. Salvati and M. Sandri and D. Santos and M. Savelainen and G. Savini and D. Scott and M. D. Seiffert and P. Serra and E. P. S. Shellard and L. D. Spencer and M. Spinelli and V. Stolyarov and R. Stompor and R. Sudiwala and R. Sunyaev and D. Sutton and A. -S. Suur-Uski and J. -F. Sygnet and J. A. Tauber and L. Terenzi and L. Toffolatti and M. Tomasi and M. Tristram and T. Trombetti and M. Tucci and J. Tuovinen and M. Turler and G. Umana and L. Valenziano and J. Valiviita and B. Van Tent and P. Vielva and F. Villa and L. A. Wade and B. D. Wandelt and I. K. Wehus and M. White and S. D. M. White and A. Wilkinson and D. Yvon and A. Zacchei and A. Zonca},
journal= {arXiv preprint arXiv:1502.01589},
year = {2016}
}
Comments
Abstract severely abridged. Revised to match version accepted by Astronomy & Astrophysics. Many minor changes, but basic results remain unchanged