# 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 J. 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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