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The Best-Fit Universe

  • Conference paper
Primordial Nucleosynthesis and Evolution of Early Universe

Part of the book series: Astrophysics and Space Science Library ((ASSL,volume 169))

Abstract

Inflation provides very strong motivation for a flat Universe, Harrison-Zel’dovich (constant-curvature) density perturbations, and cold dark matter. However, there are a number of cosmological observations that conflict with the predictions of the simplest such model—one with zero cosmological constant. They include the age of the Universe, dynamical determinations of Ω, galaxy-number counts, and the apparent abundance of large-scale structure in the Universe. While the discrepancies are not yet serious enough to rule out the simplest and “most well motivated” model, the current data point to a “best-fit model” with the following parameters: ΩB Ω 0.03, QCDM Ω 0.17, ΩΛ Ω 0.8, and H o ≃ 70 km sec-1 Mpc-1, which improves significantly the concordance with observations. While there is no good reason to expect such a value for the cosmological constant, there is no physical principle that would rule such out.

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Author information

Authors and Affiliations

  1. NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, IL, 60510-0500, USA

    Michael S. Turner

  2. Departments of Physics and Astronomy & Astrophysics Enrico Fermi Institute, The University of Chicago, Chicago, IL, 60637-1433, USA

    Michael S. Turner

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  1. Michael S. Turner
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Editors and Affiliations

  1. University of Tokyo, Tokyo, Japan

    K. Sato

  2. Institut d’Astrophysique, Paris, France

    J. Audouze

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© 1991 Springer Science+Business Media Dordrecht

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Turner, M.S. (1991). The Best-Fit Universe. In: Sato, K., Audouze, J. (eds) Primordial Nucleosynthesis and Evolution of Early Universe. Astrophysics and Space Science Library, vol 169. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-3410-1_49

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  • DOI: https://doi.org/10.1007/978-94-011-3410-1_49

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