Constraints from high redshift supernovae upon scalar field cosmologies

Journal Article · Wed Apr 01 04:00:00 EST 1998 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.57.4642· OSTI ID:627845

Frieman, J A ^[1]; Waga, I ^[2]

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1. NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois60510 (United States)
2. Universidade Federal do Rio de Janeiro, Instituto de Fisica, Rio de Janeiro, RJ, 21945-970 (Brazil)

Recent observations of high-redshift type Ia supernovae have placed stringent constraints on the cosmological constant {Lambda}. We explore the implications of these SNe observations for cosmological models in which a classically evolving scalar field currently dominates the energy density of the Universe. Such models have been shown to share the advantages of {Lambda} models: compatibility with the spatial flatness predicted by inflation; a Universe older than the standard Einstein{endash}de Sitter model; and, combined with cold dark matter, predictions for large-scale structure formation in good agreement with data from galaxy surveys. Compared to the cosmological constant, these scalar field models are consistent with the SNe observations for a lower matter density, {Omega}{sub m0}{approximately}0.2, and a higher age, H{sub 0}t{sub 0}{approx_gt}1. Combined with the fact that scalar field models imprint a distinctive signature on the cosmic microwave background anisotropy, they remain currently viable and should be testable in the near future. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 627845
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 8 Vol. 57; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANISOTROPY
BACKGROUND RADIATION
COSMOLOGICAL CONSTANT
COSMOLOGY
ENERGY DENSITY
GALAXIES
LIMITING VALUES
MICROWAVE RADIATION
NONLUMINOUS MATTER
RED SHIFT
SCALAR FIELDS
SUPERNOVAE
UNIVERSE