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Cited by 1,787Cosmology and Gravitation TheoriesDark Matter and Cosmic PhenomenaGalaxies: Formation, Evolution, Phenomena

The DOI matches its Crossref record; 334 of the 335 references it cites were found in a registry or an index, and 1 are not checked yet.

FIVE-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE OBSERVATIONS: LIKELIHOODS AND PARAMETERS FROM THE WMAP DATA

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Dunkley, J., Komatsu, E., Nolta, M. R., Spergel, D. N., Larson, D., Hinshaw, G., Page, L., Bennett, C. L., Gold, B., Jarosik, N., Weiland, J. L., Halpern, M., Hill, R. S., Kogut, A., Limon, M., Meyer, S. S., Tucker, G. S., Wollack, E., Wright, E. L.·2009·The Astrophysical Journal Supplement Series
DOI 10.1088/0067-0049/180/2/306
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Abstract

This paper focuses on cosmological constraints derived from analysis of WMAP data alone. A simple ΛCDM 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: Ω b h 2 = 0.02273 ± 0.00062, Ω c h 2 = 0.1099 ± 0.0062, Ω Λ = 0.742 ± 0.030, n s = 0.963 +0.014 −0.015 , τ = 0.087 ± 0.017, and σ 8 = 0.796 ± 0.036, with h = 0.719 +0.026 −0.027 . With five years of polarization data, we have measured the optical depth to reionization, τ>0, at 5σ significance. The redshift of an instantaneous reionization is constrained to be z reion = 11.0 ± 1.4 with 68% confidence. The 2σ lower limit is z reion > 8.2, and the 3σ limit is z reion > 6.7. This excludes a sudden reionization of the universe at z = 6 at more than 3.5σ 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 the foreground treatment of τ ∼ 0.01. This cosmological model also fits small-scale cosmic microwave background (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 nonzero cosmic neutrino background, or a background of relativistic species, with the standard three light neutrino species preferred over the best-fit ΛCDM model with N eff = 0 at >99.5% confidence, and N eff > 2.3(95%confidence limit (CL)) when varied. The five-year WMAP data improve the upper limit on the tensor-to-scalar ratio, r < 0.43(95%CL), for power-law models, and halve the limit on r for models with a running index, r < 0.58(95%CL). With longer integration we find no evidence for a running spectral index, with dn s / d ln k = −0.037 ± 0.028, and find improved limits on isocurvature fluctuations. The current WMAP -only limit on the sum of the neutrino masses is ∑ m ν < 1.3 eV(95%CL), which is robust, to within 10%, to a varying tensor amplitude, running spectral index, or dark energy equation of state.

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Research works printed but not linked: 7

  1. Blanchard, 1987, A&A, 184, 1
  2. Bunker, 2007, Deepest Astronomical Surveys, 27
  3. Easther, 2006, JCAP, 0609, 010
  4. Fukugita, 1990, MNRAS, 246, 24P
  5. Grishchuk, 1975, Sov. Phys.-JETP, 40, 409
  6. Starobinsky, 1979, ZhETF Pis ma Redaktsiiu, 30, 719
  7. Wandelt, 2003, ECONF, C030908, WELT001

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Metadata

Authors
Dunkley, J., Komatsu, E., Nolta, M. R., Spergel, D. N., Larson, D., Hinshaw, G., Page, L., Bennett, C. L., Gold, B., Jarosik, N., Weiland, J. L., Halpern, M., Hill, R. S., Kogut, A., Limon, M., Meyer, S. S., Tucker, G. S., Wollack, E., & Wright, E. L.
Affiliations
  • Princeton University (US)
  • The University of Texas at Austin (US)
  • University of Toronto (CA)
  • Johns Hopkins University (US)
  • Goddard Space Flight Center (US)
  • Adnet Systems (United States) (US)
  • University of British Columbia (CA)
  • Columbia University (US)
  • University of Chicago (US)
  • Brown University (US)
  • University of California, Los Angeles (US)
Corresponding author
  • Dunkley, J.
  • Weiland, J. L.
ORCID
Venue
The Astrophysical Journal Supplement Series
Publisher
American Astronomical Society
Published
2009-02-01
Volume
180
Issue
2
Pages
306-329
ISSN
  • 0067-0049 (ISSN-L)
  • 1538-4365
DOI
10.1088/0067-0049/180/2/306
OpenAlex
W2136696603
Cited by
1,787
References
335
Citations by year
2026: 7 · 2025: 19 · 2024: 25 · 2023: 35 · 2022: 28 · 2021: 29 · 2020: 27 · 2019: 27 · 2018: 34 · 2017: 27 · 2016: 65 · 2015: 50 · 2014: 60 · 2013: 105 · 2012: 142
FWCI
189.43
Type
journal article
Language
en
Open access
Locations
  • The Astrophysical Journal Supplement Series (publishedVersion)
  • arXiv (Cornell University) (acceptedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
  • Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Dark Matter and Cosmic Phenomena
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
Keywords
cosmic microwave background, cosmological parameter constraints, cosmic microwave background anisotropies, CMB polarization, reionization optical depth, reionization redshift, effective number of relativistic species, cosmic neutrino background, tensor-to-scalar ratio, dark energy equation of state

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