Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Likelihoods and Parameters from the WMAP data

Abstract

This paper focuses on cosmological constraints derived from analysis of WMAP data alone. A simple LCDM cosmological model fits the five-year WMAP temperature and polarization data. The basic parameters of the model are consistent with the three-year data and now better constrained: Omega_b h^2 = 0.02273+-0.00062, Omega_c h^2 = 0.1099+-0.0062, Omega_L = 0.742+-0.030, n_s = 0.963+0.014- 0.015, tau = 0.087+-0.017, sigma_8 = 0.796+-0.036. With five years of polarization data, we have measured the optical depth to reionization, tau>0, at 5 sigma significance. The redshift of an instantaneous reionization is constrained to be z_reion = 11.0+-1.4 with 68% confidence. This excludes a sudden reionization of the universe at z=6 at more than 3.5 sigma significance, suggesting that reionization was an extended process. Using two methods for polarized foreground cleaning we get consistent estimates for the optical depth, indicating an error due to foreground treatment of tau~0.01. This cosmological model also fits small-scale CMB data, and a range of astronomical data measuring the expansion rate and clustering of matter in the universe. We find evidence for the first time in the CMB power spectrum for a non-zero cosmic neutrino background, or a background of relativistic species, with the standard three light neutrino species preferred over the best-fit LCDM model with N_eff=0 at >99.5% confidence, and N_eff > 2.3 (95% CL) when varied. The five-year WMAP data improve the upper limit on the tensor-to-scalar ratio to r < 0.43 (95% CL), for power-law models. With longer integration we find no evidence for a running spectral index, with dn_s/dlnk = -0.037+-0.028.

49 pages, 18 figures, version accepted by ApJS. Original Section 2 moved to separate paper. For higher quality figs, see version on http://lambda.gsfc.nasa.gov

References in corpus (26)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• New Hubble Space Telescope Discoveries of Type Ia Supernovae at z > 1: Narrowing Constraints on the Early Behavior of Dark Energy
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
• Improved Cosmological Constraints from New, Old and Combined Supernova Datasets
• Observational Constraints on the Nature of the Dark Energy: First Cosmological Results from the ESSENCE Supernova Survey
• Improved Distances to Type Ia Supernovae with Multicolor Light Curve Shapes: MLCS2k2
• Measuring the Baryon Acoustic Oscillation scale using the SDSS and 2dFGRS
• A test of the nature of cosmic acceleration using galaxy redshift distortions
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Angular Power Spectra
• Correlation of CMB with large-scale structure: I. ISW Tomography and Cosmological Implications
• Combined analysis of the integrated Sachs-Wolfe effect and cosmological implications
• Correlation of CMB with large-scale structure: II. Weak lensing
• Testing LCDM with the Growth Function δ(a): Current Constraints
• On the growth of linear perturbations
• Strong lensing optical depths in a \LambdaCDM universe
• The Wilkinson Microwave Anisotropy Probe (WMAP) Source Catalog
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP)Observations: Beam Maps and Window Functions
• Strong lensing optical depths in a LCDM universe II: the influence of the stellar mass in galaxies
• Observational bounds on the cosmic radiation density
• The Sloan Digital Sky Survey Quasar Lens Search. III. Constraints on Dark Energy from the Third Data Release Quasar Lens Catalog
• Primordial Lithium Abundance in Catalyzed Big Bang Nucleosynthesis
• Correlated adiabatic and isocurvature CMB fluctuations in the wake of the WMAP
• Solving the cosmic lithium problems with primordial late-decaying particles
• Primordial Helium Abundance from CMB: a constraint from recent observations and a forecast
• The Cosmic Neutrino Background and the Age of the Universe
• Nonlinear corrections to the cosmological matter power spectrum and scale-dependent galaxy bias: implications for parameter estimation

Cited by in corpus (141)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
• A New Calculation of the Ionizing Background Spectrum and the Effects of HeII Reionization
• Approaches to Understanding Cosmic Acceleration
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Angular Power Spectra
• Stellar and total baryon mass fractions in groups and clusters since redshift 1
• The Population of Viscosity- and Gravitational Wave-Driven Supermassive Black Hole Binaries Among Luminous AGN
• Dynamics of interacting dark energy
• Searching for modified growth patterns with tomographic surveys
• A lower bound on the mass of Dark Matter particles
• Damped Lyman Alpha Systems in Galaxy Formation Simulations
• Generalised constraints on the curvature perturbation from primordial black holes
• Realistic sterile neutrino dark matter with keV mass does not contradict cosmological bounds
• Primordial Curvature Fluctuation and Its Non-Gaussianity in Models with Modulated Reheating
• Dependence of Interstellar Turbulent Pressure on Supernova Rate
• Constraining the Scatter in the Mass-Richness Relation of maxBCG Clusters With Weak Lensing and X-ray Data
• The Impact of Feedback on Disk Galaxy Scaling Relations
• The Fast Fourier Transform Telescope
• Microwave Background Constraints on Mixing of Photons with Hidden Photons
• Constraints on Dark Matter annihilations from reionization and heating of the intergalactic gas
• The Growth of Structure in Interacting Dark Energy Models
• CMB polarization features from inflation versus reionization
• Reconstructing the Distortion Function for Nonlocal Cosmology
• On the Origin of Exponential Galaxy Disks
• Halo masses for optically-selected and for radio-loud AGN from clustering and galaxy-galaxy lensing
• Constraints on cosmic hemispherical power anomalies from quasars
• Properties of the scale factor measure
• Galactic Globular and Open Clusters in the Sloan Digital Sky Survey. II. Test of Theoretical Stellar Isochrones
• Gamma rays from the annihilation of singlet scalar dark matter
• Polarized CMB power spectrum estimation using the pure pseudo-cross-spectrum approach
• De-Rotation of the Cosmic Microwave Background Polarization: Full-Sky Formalism
• Estimation of cosmological parameters using adaptive importance sampling
• Varying the Universality of Supersymmetry-Breaking Contributions to MSSM Higgs Boson Masses
• A generalized equation of state for dark energy
• Sterile Neutrinos in Light of Recent Cosmological and Oscillation Data: a Multi-Flavor Scheme Approach
• z~7-10 Galaxies behind Lensing Clusters: Contrast with Field Search Results
• Right-handed sneutrino dark matter in the NMSSM
• Eddington-Born-Infeld gravity and the large scale structure of the Universe
• CMB Polarization Systematics, Cosmological Birefringence and the Gravitational Waves Background
• Is a step in the primordial spectral index favored by CMB data ?
• The number density of a charged relic
• Do WMAP data favor neutrino mass and a coupling between Cold Dark Matter and Dark Energy?
• A Constraint on Planck-scale Modifications to Electrodynamics with CMB polarization data
• How Dark Matter Reionized The Universe
• Faraday rotation, stochastic magnetic fields and CMB maps
• Ultradeep Near-Infrared Observations of GOODS 850-5
• The Little Review on Leptogenesis
• Constraints on amplitudes of curvature perturbations from primordial black holes
• The Interplay Between the "Low" and "High" Energy CP-Violation in Leptogenesis
• Alleviation of Cosmic Age Problem In Interacting Dark Energy Model
• The High Redshift Integrated Sachs-Wolfe Effect
• Constraints from CMB on Spacetime Noncommutativity and Causality Violation
• Sharpening the Precision of the Sunyaev-Zel'dovich Power Spectrum
• Electroweak Resonant Leptogenesis in the Singlet Majoron Model
• Limits on Isocurvature Perturbations from Non-Gaussianity in WMAP Temperature Anisotropies
• Relic Gravitational Waves with A Running Spectral Index and Its Constraints at High Frequencies
• The cosmological BCS mechanism and the Big Bang Singularity
• Probing the Effective Number of Neutrino Species with Cosmic Microwave Background
• A Multi-Parameter Investigation of Gravitational Slip
• Non-Gaussianity and Baryonic Isocurvature Fluctuations in the Curvaton Scenario
• Early Dark Energy at High Redshifts: Status and Perspectives
• Mainly axion cold dark matter in the minimal supergravity model
• Sneutrino NLSP Scenarios in the NUHM with Gravitino Dark Matter
• The signature of dark energy perturbations in galaxy cluster surveys
• Small Angular Scale Measurements of the CMB Temperature Power Spectrum from QUaD
• Luminous Red Galaxy Halo Density Field Reconstruction and Application to Large Scale Structure Measurements
• Cold Dark Matter Isocurvature Perturbations: Constraints and Model Selection
• Large curvature perturbations near horizon crossing in single-field inflation models
• Galaxy Satellites and the Weak Equivalence Principle
• Double Type-II Seesaw, Baryon Asymmetry and Dark Matter for Cosmic e^\pm Excesses
• Neutralino Dark Matter with Inert Higgsinos and Singlinos
• Cosmic age, Statefinder and $Om$ diagnostics in the decaying vacuum cosmology
• Fluctuations in the Ionizing Background During and After Helium Reionization
• Primordial Helium Abundance from CMB: a constraint from recent observations and a forecast
• Flavon Inflation
• Cosmological constraints on the Hu-Sawicki modified gravity scenario
• First stars and the extragalactic background light: How recent gamma-ray observations constrain the early universe
• Averaging Robertson-Walker Cosmologies
• Prospects for dark matter detection with IceCube in the context of the CMSSM
• Combining Semi-analytic Models with Simulations of Galaxy Clusters: the Need for Heating from Active Galactic Nuclei
• Three-Point Correlations in f(R) Models of Gravity
• Unifying cosmological and recent time variations of fundamental couplings
• Supersymmetric Leptogenesis and the Gravitino Bound
• CMB Temperature Polarization Correlation and Primordial Gravitational Waves
• Dirac Born Infeld (DBI) Cosmic Strings
• BMSSM Implications for Cosmology
• Cosmological Parameters from the QUaD CMB polarization experiment
• Testing the (generalized) Chaplygin gas model with the Lookback time-Redshift data
• Constraints on the High-l Power Spectrum of Millimeter-wave Anisotropies from APEX-SZ
• Constraints on neutrino masses from WMAP5 and BBN in the lepton asymmetric universe
• A Yukawa coupling parameterization for type I+ II seesaw formula and applications to lepton flavor violation and leptogenesis
• Effects of the size of cosmological N-Body simulations on physical quantities - III: Skewness
• Evidence for horizon-scale power from CMB polarization
• On Gaugino Contributions to Soft Leptogenesis
• Statefinder parameters for quantum effective Yang-Mills condensate dark energy model
• Decoupling Dark Energy from Matter
• Model independent approaches to reionization in the analysis of upcoming CMB data
• Lensed Cosmic Microwave Background Constraints on Post-General Relativity Parameters
• Curvature Perturbation from Supersymmetric Flat Directions
• Leptogenesis in a model with Friedberg-Lee symmetry
• Ohmic currents and pre-decoupling magnetism
• CMBPol Mission Concept Study: Reionization Science with the Cosmic Microwave Background
• Dark Matter Astrophysics
• Dynamical evolutin of quintessence dark energy in collapsing dark matter halos
• The contribution of the kinematic Sunyaev-Zel'dovich Effect from the Warm Hot Intergalactic Medium to the Five-Year WMAP Data
• Textures and Semi-Local Strings in SUSY Hybrid Inflation
• X-ray Clusters of Galaxies as Cosmological Tools
• Is the misalignment of the Local Group velocity and the 2MASS Redshift Survey dipole typical in a LambdaCDM model?
• Quark-Novae, cosmic reionization, and early r-process element production
• Neutralino relic density from ILC measurements in the CPV MSSM
• Probing the Warm Dark Matter with High-z Quasar Luminosity Function
• Spatial Correlations in the Helium-Ionizing Background
• The primordial "f_NL" non-Gaussianity, and perturbations beyond the present horizon
• The long-lived stau as a thermal relic
• Dark matter direct detection in the MSSM with heavy scalars
• Null geodesics and observational cosmology
• Is a Dissipative Regime During Inflation in Agreement with Observations?
• Constraining Modified Gravity with Large non-Gaussianities
• Galaxy systems in the optical and infrared
• Estimation of the Hubble Constant and Constraint on Descriptions of Dark Energy
• Some aspects of neutrino mixing and oscillations
• Measuring the mass profile of galaxy clusters beyond their virial radius
• Crossing the cosmological constant barrier with kinetically interacting double quintessence
• Constraining Extended Reionization Models Through Arcminute-Scale CMB Measurements
• Inflation from a Non-Local Theory of Gravity
• How To Determine SUSY Mass Scales Now
• Building a Better mSUGRA: WIMP Dark Matter Without Flavor Violation
• Higgs mass from cosmological and astrophysical measurements
• Anomalies, U(1)' and the MSSM
• Axion hot dark matter bounds
• The Primordial Helium Abundance
• Non-adiabatic instability in coupled dark sectors
• Dynamical suppression of non-adiabatic modes
• Testing gravity on large scales. The skewness of the galaxy distribution at z~1
• Probing the last scattering surface through the recent and future CMB observations
• Adiabatic fluctuations from cosmic strings in a contracting universe
• High redshift galaxy surveys
• Non-Gaussian Distribution and Clustering of Hot and Cold Pixels in the WMAP Five-Year Sky
• Sunyaev-Zel'dovich Effect Observations of the Bullet Cluster (1E 0657-56) with APEX-SZ
• Quantum Boltzmann equations in resonant leptogenesis
• Turbulent formation of protogalaxies at the end of the plasma epoch: theory and observations