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dc.creatorKomatsu, Eiichiroen_US
dc.creatorSmith, K. M.en_US
dc.creatorDunkley, J.en_US
dc.creatorBennett, C. L.en_US
dc.creatorGold, B.en_US
dc.creatorHinshaw, G.en_US
dc.creatorJarosik, N.en_US
dc.creatorLarson, D.en_US
dc.creatorNolta, M. R.en_US
dc.creatorPage, L.en_US
dc.creatorSpergel, D. N.en_US
dc.creatorHalpern, M.en_US
dc.creatorHill, R. S.en_US
dc.creatorKogut, A.en_US
dc.creatorLimon, M.en_US
dc.creatorMeyer, S. S.en_US
dc.creatorOdegard, N.en_US
dc.creatorTucker, G. S.en_US
dc.creatorWeiland, J. L.en_US
dc.creatorWollack, E.en_US
dc.creatorWright, E. L.en_US
dc.date.accessioned2016-10-28T19:35:55Z
dc.date.available2016-10-28T19:35:55Z
dc.date.issued2011-02en_US
dc.identifierdoi:10.15781/T28P5VC51
dc.identifier.citationKomatsu, E., K. M. Smith, J. Dunkley, C. L. Bennett, and B. Gold. "Sevenyear Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation. ApJS 192, 18–+(2011)." arXiv preprint arXiv:1001.4538.en_US
dc.identifier.issn0067-0049en_US
dc.identifier.urihttp://hdl.handle.net/2152/42996
dc.description.abstractThe combination of seven-year data from WMAP and improved astrophysical data rigorously tests the standard cosmological model and places new constraints on its basic parameters and extensions. By combining the WMAP data with the latest distance measurements from the baryon acoustic oscillations (BAO) in the distribution of galaxies and the Hubble constant (H-0) measurement, we determine the parameters of the simplest six-parameter Lambda CDM model. The power-law index of the primordial power spectrum is n(s) = 0.968 +/- 0.012 (68% CL) for this data combination, a measurement that excludes the Harrison-Zel'dovich-Peebles spectrum by 99.5% CL. The other parameters, including those beyond the minimal set, are also consistent with, and improved from, the five-year results. We find no convincing deviations from the minimal model. The seven-year temperature power spectrum gives a better determination of the third acoustic peak, which results in a better determination of the redshift of the matter-radiation equality epoch. Notable examples of improved parameters are the total mass of neutrinos, Sigma m(nu) < 0.58 eV (95% CL), and the effective number of neutrino species, N-eff = 4.34(-0.88)(+0.86) (68% CL), which benefit from better determinations of the third peak and H-0. The limit on a constant dark energy equation of state parameter from WMAP+BAO+H-0, without high-redshift Type Ia supernovae, is w = -1.10 +/- 0.14 (68% CL). We detect the effect of primordial helium on the temperature power spectrum and provide a new test of big bang nucleosynthesis by measuring Y-p = 0.326 +/- 0.075 (68% CL). We detect, and show on the map for the first time, the tangential and radial polarization patterns around hot and cold spots of temperature fluctuations, an important test of physical processes at z = 1090 and the dominance of adiabatic scalar fluctuations. The seven-year polarization data have significantly improved: we now detect the temperature-E-mode polarization cross power spectrum at 21 sigma, compared with 13 sigma from the five-year data. With the seven-year temperature-B-mode cross power spectrum, the limit on a rotation of the polarization plane due to potential parity-violating effects has improved by 38% to Delta a = -1 degrees.1 +/- 1 degrees.4(statistical) +/- 1 degrees.5(systematic) (68% CL). We report significant detections of the Sunyaev-Zel'dovich (SZ) effect at the locations of known clusters of galaxies. The measured SZ signal agrees well with the expected signal from the X-ray data on a cluster-by-cluster basis. However, it is a factor of 0.5-0.7 times the predictions from "universal profile" of Arnaud et al., analytical models, and hydrodynamical simulations. We find, for the first time in the SZ effect, a significant difference between the cooling-flow and non-cooling-flow clusters (or relaxed and non-relaxed clusters), which can explain some of the discrepancy. This lower amplitude is consistent with the lower-than-theoretically expected SZ power spectrum recently measured by the South Pole Telescope Collaboration.en_US
dc.description.sponsorshipNASA NNG05GE76G, NNX07AL75G S01, LTSA03-000-0090, ATPNNG04GK55G, ADP03-0000-092, NNX08AL43Gen_US
dc.description.sponsorshipNSF AST-0807649, PHY-0758153en_US
dc.description.sponsorshipAlfred P. Sloan Research Fellowshipen_US
dc.description.sponsorshipResearch Councils UK (RCUK)en_US
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.subjectcosmic background radiationen_US
dc.subjectcosmology: observationsen_US
dc.subjectdark matteren_US
dc.subjectearlyen_US
dc.subjectuniverseen_US
dc.subjectspace vehiclesen_US
dc.subjectdigital sky surveyen_US
dc.subjectprimordial non-gaussianityen_US
dc.subjectcosmicen_US
dc.subjectbackground-radiationen_US
dc.subjectrelaxed galaxy clustersen_US
dc.subjectequation-of-stateen_US
dc.subjectdark-matter haloen_US
dc.subjectisothermal density perturbationsen_US
dc.subjectinflationaryen_US
dc.subjectuniverse scenarioen_US
dc.subjectgravitational lensing systemsen_US
dc.subjectgalactic foregrounden_US
dc.subjectemissionen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleSeven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological interpretationen_US
dc.typeArticleen_US
dc.description.departmentAstronomyen_US
dc.rights.restrictionOpenen_US
dc.identifier.doi10.1088/0067-0049/192/2/18en_US
dc.contributor.utaustinauthorKomatsu, Eiichiroen_US
dc.relation.ispartofserialAstrophysical Journal Supplement Seriesen_US


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