# First-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters

@article{Spergel2003FirstYearWM, title={First-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters}, author={David N. Spergel and Licia Verde and Hiranya V. Peiris and Eiichiro Komatsu and Michael R. Nolta and Charles L. Bennett and Mark Halpern and Gary F. Hinshaw and Norman Jarosik and Alan Kogut and Michele Limon and Stephan S. Meyer and Lyman A. Page and Gregory S. Tucker and Janet L. Weiland and Edward J. Wollack and E. L. Wright Princeton and Nasa Gsfc and Ubc and U. Chicaco and Brown and Ssai and Ucla}, journal={The Astrophysical Journal Supplement Series}, year={2003}, volume={148}, pages={175 - 194} }

WMAP precision data enable accurate testing of cosmological models. We find that the emerging standard model of cosmology, a flat Λ-dominated universe seeded by a nearly scale-invariant adiabatic Gaussian fluctuations, fits the WMAP data. For the WMAP data only, the best-fit parameters are h = 0.72 ± 0.05, Ωbh2 = 0.024 ± 0.001, Ωmh2 = 0.14 ± 0.02, τ = 0.166, ns = 0.99 ± 0.04, and σ8 = 0.9 ± 0.1. With parameters fixed only by WMAP data, we can fit finer scale cosmic microwave background (CMB…

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## References

SHOWING 1-10 OF 134 REFERENCES

### First-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Parameter Estimation Methodology

- Physics
- 2003

We describe our methodology for comparing the Wilkinson Microwave Anisotropy Probe (WMAP) measurements of the cosmic microwave background (CMB) and other complementary data sets to theoretical…

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### First-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Implications For Inflation

- Physics
- 2003

We confront predictions of inflationary scenarios with the Wilkinson Microwave Anisotropy Probe (WMAP) data, in combination with complementary small-scale cosmic microwave background (CMB)…

### The Age of the Universe and the Cosmological Constant Determined from Cosmic Microwave Background Anisotropy Measurements

- Physics
- 2001

If Ωtot = 1 and structure formed from adiabatic initial conditions, then the age of the universe, as constrained by measurements of the cosmic microwave background (CMB), is t0 = 14.0 ± 0.5 Gyr. The…

### Cosmic Shear and Power Spectrum Normalization with the Hubble Space Telescope

- Physics
- 2002

Weak lensing by large-scale structure provides a direct measurement of matter fluctuations in the universe. We report a measurement of this "cosmic shear" based on 271 Wide Field Planetary Camera 2…

### Determining the Cosmic Distance Scale from Interferometric Measurements of the Sunyaev-Zeldovich Effect

- Physics
- 2001

We determine the distances to 18 galaxy clusters with redshifts ranging from z ~ 0.14 to 0.78 from a maximum likelihood joint analysis of 30 GHz interferometric Sunyaev-Zeldovich effect (SZE) and…

### First-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Temperature-Polarization Correlation

- Physics
- 2003

The Wilkinson Microwave Anisotropy Probe (WMAP) has mapped the full sky in Stokes I, Q, and U parameters at frequencies of 23, 33, 41, 61, and 94 GHz. We detect correlations between the temperature…

### Cosmic Microwave Background Observables and Their Cosmological Implications

- Physics
- 2001

We show that recent measurements of the power spectrum of cosmic microwave background anisotropies by Boomerang and MAXIMA can be mainly characterized by four observables: the position of the first…

### First-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results

- Physics
- 2003

We present full-sky microwave maps in five frequency bands (23-94 GHz) from the Wilkinson Microwave Anisotropy Probe (WMAP) first-year sky survey. Calibration errors are less than 0.5%, and the low…

### Measurements of Ω and Λ from 42 High-Redshift Supernovae

- Physics
- 1998

We report measurements of the mass density, ΩM, and cosmological-constant energy density, ΩΛ, of the universe based on the analysis of 42 type Ia supernovae discovered by the Supernova Cosmology…