The best-fit universe

Conference · Mon Oct 01 04:00:00 EDT 1990

OSTI ID:6480828

Turner, M S ^[1]

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1. Fermi National Accelerator Lab., Batavia, IL (USA) Chicago Univ., IL (USA). Enrico Fermi Inst.

Inflation provides very strong motivation for a flat Universe, Harrison-Zel'dovich (constant-curvature) 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 {Omega}, 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: {Omega}{sub B} {approx equal} 0.03, {Omega}{sub CDM} {approx equal} 0.17, {Omega}{sub {Lambda}} {approx equal} 0.8, and H{sub 0} {approx equal} 70 km sec{sup {minus}1} Mpc{sup {minus}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 out such. 42 refs.

• Research Organization: Fermi National Accelerator Lab., Batavia, IL (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC02-76CH03000
• OSTI ID: 6480828
• Report Number(s): FNAL/C-90/226-A; CONF-9006282--3; ON: DE91004583
• Country of Publication: United States
• Language: English

Related Subjects

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