2024-03-29T07:32:47Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1405852018-06-25T08:48:30Zcom_10261_37com_10261_4col_10261_290
Planck 2015 results. XIII. Cosmological parameters
Efstathiou, G.
Barreiro, R. Belén
Bonavera, Laura
Curto, Andrés
Diego, José María
González-Nuevo, J.
Herranz, D.
López-Caniego, M.
Martínez-González, Enrique
Toffolatti, L.
Vielva, P.
Rebolo López, Rafael
Planck Collaboration
Science Foundation Ireland
Fundação para a Ciência e a Tecnologia (Portugal)
UK Space Agency
Department of Energy (US)
Agenzia Spaziale Italiana
Center for Science (Finland)
Academy of Finland
Science and Technology Facilities Council (UK)
National Aeronautics and Space Administration (US)
Istituto Nazionale di Astrofisica
Centre National de la Recherche Scientifique (France)
European Space Agency
Junta de Andalucía
Consejo Superior de Investigaciones Científicas (España)
Ministerio de Economía y Competitividad (España)
European Commission
European Research Council
DTU Space (Denmark)
Swiss Space Office
German Centre for Air and Space Travel
Max Planck Society
Cosmological parameters
Cosmology: observations
Cosmic background radiation
Cosmology: theory
Cosmology (including clusters of galaxies).-- et al.
This paper presents cosmological results based on full-mission Planck observations of temperature and polarization anisotropies of the cosmic microwave background (CMB) radiation. Our results are in very good agreement with the 2013 analysis of the Planck nominal-mission temperature data, but with increased precision. The temperature and polarization power spectra are consistent with the standard spatially-flat 6-parameter ΛCDM cosmology with a power-law spectrum of adiabatic scalar perturbations (denoted >base ΛCDM> in this paper). From the Planck temperature data combined with Planck lensing, for this cosmology we find a Hubble constant, H = (67.8 ± 0.9) km sMpc, a matter density parameter Ω = 0.308 ± 0.012, and a tilted scalar spectral index with n = 0.968 ± 0.006, consistent with the 2013 analysis. Note that in this abstract we quote 68% confidence limits on measured parameters and 95% upper limits on other parameters. We present the first results of polarization measurements with the Low Frequency Instrument at large angular scales. Combined with the Planck temperature and lensing data, these measurements give a reionization optical depth of τ = 0.066 ± 0.016, corresponding to a reionization redshift of \hbox{$z-{\rm re}=8.8{+1.7}-{-1.4}$}. These results are consistent with those from WMAP polarization measurements cleaned for dust emission using 353-GHz polarization maps from the High Frequency Instrument. We find no evidence for any departure from base ΛCDM in the neutrino sector of the theory; for example, combining Planck observations with other astrophysical data we find N = 3.15 ± 0.23 for the effective number of relativistic degrees of freedom, consistent with the value N = 3.046 of the Standard Model of particle physics. The sum of neutrino masses is constrained to â'm < 0.23 eV. The spatial curvature of our Universe is found to be very close to zero, with | Ω | < 0.005. Adding a tensor component as a single-parameter extension to base ΛCDM we find an upper limit on the tensor-to-scalar ratio of r< 0.11, consistent with the Planck 2013 results and consistent with the B-mode polarization constraints from a joint analysis of BICEP2, Keck Array, and Planck (BKP) data. Adding the BKP B-mode data to our analysis leads to a tighter constraint of r < 0.09 and disfavours inflationarymodels with a V(φ) φ potential. The addition of Planck polarization data leads to strong constraints on deviations from a purely adiabatic spectrum of fluctuations. We find no evidence for any contribution from isocurvature perturbations or from cosmic defects. Combining Planck data with other astrophysical data, including Type Ia supernovae, the equation of state of dark energy is constrained to w =-1.006 ± 0.045, consistent with the expected value for a cosmological constant. The standard big bang nucleosynthesis predictions for the helium and deuterium abundances for the best-fit Planck base ΛCDM cosmology are in excellent agreement with observations. We also constraints on annihilating dark matter and on possible deviations from the standard recombination history. In neither case do we find no evidence for new physics. The Planck results for base ΛCDM are in good agreement with baryon acoustic oscillation data and with the JLA sample of Type Ia supernovae. However, as in the 2013 analysis, the amplitude of the fluctuation spectrum is found to be higher than inferred from some analyses of rich cluster counts and weak gravitational lensing. We show that these tensions cannot easily be resolved with simple modifications of the base ΛCDM cosmology. Apart from these tensions, the base ΛCDM cosmology provides an excellent description of the Planck CMB observations and many other astrophysical data sets.
The Planck Collaboration acknowledges the support of: ESA; CNES and CNRS/INSU-IN2P3-INP (France); ASI, CNR, and INAF (Italy); NASA and DoE (USA); STFC and UKSA (UK); CSIC, MINECO, JA, and RES (Spain); Tekes, AoF, and CSC (Finland); DLR and MPG (Germany); CSA (Canada); DTU Space (Denmark); SER/SSO (Switzerland); RCN
(Norway); SFI (Ireland); FCT/MCTES (Portugal); ERC and PRACE (EU). The research leading to these results has received funding from the European Research Council under the European Union’s Seventh Framework Programme (FP/2007−2013)/ERC Grant Agreement No. [616170] and from the UK Science and Technology Facilities Council [grant number ST/L000652/1].
Peer Reviewed
2016-11-23T07:45:04Z
2016-11-23T07:45:04Z
2016
2016-11-23T07:45:05Z
artículo
http://purl.org/coar/resource_type/c_6501
doi: 10.1051/0004-6361/201525830
e-issn: 1432-0746
issn: 0004-6361
Astronomy and Astrophysics 594: A13 (2016)
http://hdl.handle.net/10261/140585
10.1051/0004-6361/201525830
http://dx.doi.org/10.13039/501100001602
http://dx.doi.org/10.13039/501100001871
http://dx.doi.org/10.13039/501100003981
http://dx.doi.org/10.13039/501100000271
http://dx.doi.org/10.13039/100000104
http://dx.doi.org/10.13039/501100005184
http://dx.doi.org/10.13039/501100004794
http://dx.doi.org/10.13039/501100000844
http://dx.doi.org/10.13039/501100003339
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/501100000781
http://dx.doi.org/10.13039/501100002946
http://dx.doi.org/10.13039/501100004189
http://dx.doi.org/10.13039/100000015
http://dx.doi.org/10.13039/501100002341
http://dx.doi.org/10.13039/100011690
http://dx.doi.org/10.13039/501100011011
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/EC/FP7/616170
Publisher's version
http://dx.doi.org/10.1051/0004-6361/201525830
Sí
open
EDP Sciences