Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results

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dc.contributor.utaustinauthorKomatsu, Eiichiroen_US
dc.creatorHinshaw, G.en_US
dc.creatorLarson, D.en_US
dc.creatorKomatsu, Eiichiroen_US
dc.creatorSpergel, D. N.en_US
dc.creatorBennett, C. L.en_US
dc.creatorDunkley, J.en_US
dc.creatorNolta, M. R.en_US
dc.creatorHalpern, M.en_US
dc.creatorHill, R. S.en_US
dc.creatorOdegard, N.en_US
dc.creatorPage, L.en_US
dc.creatorSmith, K. M.en_US
dc.creatorWeiland, J. L.en_US
dc.creatorGold, B.en_US
dc.creatorJarosik, N.en_US
dc.creatorKogut, A.en_US
dc.creatorLimon, M.en_US
dc.creatorMeyer, S. S.en_US
dc.creatorTucker, G. S.en_US
dc.creatorWollack, E.en_US
dc.creatorWright, E. L.en_US
dc.date.accessioned2016-10-28T19:35:11Z
dc.date.available2016-10-28T19:35:11Z
dc.date.issued2013-10en_US
dc.description.abstractWe present cosmological parameter constraints based on the final nine-year Wilkinson Microwave Anisotropy Probe (WMAP) data, in conjunction with a number of additional cosmological data sets. The WMAP data alone, and in combination, continue to be remarkably well fit by a six-parameter Delta CDM model. When WMAP data are combined with measurements of the high-l cosmic microwave background anisotropy, the baryon acoustic oscillation scale, and the Hubble constant, the matter and energy densities, Omega(b)h(2), Omega(c)h(2), and Omega(Lambda), are each determined to a precision of similar to 1.5%. The amplitude of the primordial spectrum is measured to within 3%, and there is now evidence for a tilt in the primordial spectrum at the 5 sigma level, confirming the first detection of tilt based on the five-year WMAP data. At the end of the WMAP mission, the nine-year data decrease the allowable volume of the six-dimensional Delta CDM parameter space by a factor of 68,000 relative to pre-WMAP measurements. We investigate a number of data combinations and show that their Delta CDM parameter fits are consistent. New limits on deviations from the six-parameter model are presented, for example: the fractional contribution of tensor modes is limited to r < 0.13 (95% CL); the spatial curvature parameter is limited to Omega(k) = -0.0027(-0.0038)(+0.0039); the summed mass of neutrinos is limited to Sigma m(nu) < 0.44 eV (95% CL); and the number of relativistic species is found to lie within N-eff = 3.84 +/- 0.40, when the full data are analyzed. The joint constraint on N-eff and the primordial helium abundance, Y-He, agrees with the prediction of standard big bang nucleosynthesis. We compare recent Planck measurements of the Sunyaev-Zel'dovich effect with our seven-year measurements, and show their mutual agreement. Our analysis of the polarization pattern around temperature extrema is updated. This confirms a fundamental prediction of the standard cosmological model and provides a striking illustration of acoustic oscillations and adiabatic initial conditions in the early universe.en_US
dc.description.departmentAstronomyen_US
dc.description.sponsorshipCanadian Institute for Advanced Researchen_US
dc.description.sponsorshipJohns Hopkins Universityen_US
dc.description.sponsorshipPerimeter Institute by the Government of Canada through Industry Canadaen_US
dc.description.sponsorshipProvince of Ontario through the Ministry of Research Innovationen_US
dc.description.sponsorshipNASA NNX08AL43G, NNX11AD25Gen_US
dc.description.sponsorshipNSF AST-0807649, PHY-0758153en_US
dc.description.sponsorshipCanada Foundation for Innovation under Compute Canadaen_US
dc.description.sponsorshipGovernment of Ontarioen_US
dc.description.sponsorshipOntario Research Fund-Research Excellenceen_US
dc.description.sponsorshipUniversity of Torontoen_US
dc.description.sponsorshipNASA Headquartersen_US
dc.identifierdoi:10.15781/T2ST7F05X
dc.identifier.citationHinshaw, G., D. Larson, E. Komatsu, D. N. Spergel, C. L. Bennett, J. Dunkley, M. R. Nolta et al. "Nine-year Wilkinson Microwave Anisotropy Probe (WMAP) observations: cosmological parameter results." The Astrophysical Journal Supplement Series, Vol. 208, No. 2 (Oct., 2013): 19.en_US
dc.identifier.doi10.1088/0067-0049/208/2/19en_US
dc.identifier.issn0067-0049en_US
dc.identifier.urihttp://hdl.handle.net/2152/42961
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.relation.ispartofserialAstrophysical Journal Supplement Seriesen_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.rights.restrictionOpenen_US
dc.subjectcosmic background radiationen_US
dc.subjectcosmology: observationsen_US
dc.subjectdark matteren_US
dc.subjectearlyen_US
dc.subjectuniverseen_US
dc.subjectinstrumentation: detectorsen_US
dc.subjectspace vehiclesen_US
dc.subjectspace vehicles:en_US
dc.subjectinstrumentsen_US
dc.subjecttelescopesen_US
dc.subjectbaryon acoustic-oscillationsen_US
dc.subjectsouth-pole telescopeen_US
dc.subjectdigital sky surveyen_US
dc.subjectsupernova legacy surveyen_US
dc.subjecthubble-space-telescopeen_US
dc.subjectbackground poweren_US
dc.subjectspectrumen_US
dc.subjectbrightest cluster sampleen_US
dc.subjectmassive galaxy clustersen_US
dc.subjectiaen_US
dc.subjectsupernovaeen_US
dc.subjectdark energyen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleNine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Resultsen_US
dc.typeArticleen_US

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