The Case for Ω[TINF][ITAL]M[/ITAL][/TINF] = 0.33 ± 0.035
- 10 September 2002
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 576 (2) , L101-L104
- https://doi.org/10.1086/343782
Abstract
For decades, the determination of the mean density of matter (ΩM) has been tied to the distribution of light. This has led to a "bias," perhaps as large as a factor of 2, in determining a key cosmological parameter. Recent measurements of the physical properties of clusters, the cosmic microwave background anisotropy, and the power spectrum of mass inhomogeneity now allow a determination of ΩM without "visual bias." The early data lead to a consistent picture of the matter and baryon densities, with ΩB = 0.039 ± 0.0075 and ΩM = 0.33 ± 0.035, respectively.Keywords
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