Work

The Case for Ω[TINF][ITAL]M[/ITAL][/TINF] = 0.33 ± 0.035

Year: 2002

Type: article

Abstract: For decades, the determination of the mean density of matter (Ω M ) 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 Ω M without "visual bias." The early data lead to a consistent picture of the matter and baryon densities, with Ω B = 0.039 ± 0.0075 and Ω M = 0.33 ± 0.035, respectively.

Source: The Astrophysical Journal

DOI: 10.1086/343782

Author: Michael S. Turner

Institution: University of Chicago

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funders: National Science Foundation, National Aeronautics and Space Administration, Aspen Center for Physics, Fermilab

Award: PARTICLE COSMOLOGY - ATP