Decaying Dark Energy in Higher-Dimensional Gravity

Abstract

We use data from observational cosmology to put constraints on higher-dimensional extensions of general relativity in which the effective four-dimensional dark-energy density (or cosmological "constant") decays with time. In particular we study the implications of this decaying dark energy for the age of the universe, large-scale structure formation, big-bang nucleosynthesis and the magnitude-redshift relation for Type Ia supernovae. Two of these tests (age and the magnitude-redshift relation) place modest lower limits on the free parameter of the theory, a cosmological length scale L akin to the de Sitter radius. These limits will improve if experimental uncertainties on supernova magnitudes can be reduced around z=1.

11 pages, 5 figures, submitted to A&A

References in corpus (14)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Cosmological Results from High-z Supernovae
• Kaluza-Klein Gravity
• Evolution of the Scale Factor with a Variable Cosmological Term
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Interpretation of the TT and TE Angular Power Spectrum Peaks
• Dark Matter and Background Light
• Tuning the Clock: Uranium and Thorium Chronometers Applied to CS 31082-001
• The r-process in the neutrino winds of core-collapse supernovae and U-Th cosmochronology
• Complementary Measures of the Mass Density and Cosmological Constant
• Null Geodesics in Five Dimensional Manifolds
• Solar System Tests of Higher-Dimensional Gravity
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• Gauge-Dependent Cosmological "Constant"
• Using the acoustic peak to measure cosmological parameters

Cited by in corpus (14)

• The Status of Modern Five-Dimensional Gravity
• Inducing the cosmological constant from five-dimensional Weyl space
• Late time cosmic acceleration in modified Sáez-Ballester theory
• Vacuum Waves
• Noncompactified Kaluza--Klein Gravity
• Mach's Principle and Higher-Dimensional Dynamics
• Embeddings for General Relativity
• Cosmic Acceleration from Varying Masses in Five Dimensions
• Scaling Relations for the Cosmological "Constant" in Five-Dimensional Relativity
• Embeddings for 4D Einstein equations with a cosmological constant
• The importance of scalar fields as extradimensional metric components in Kaluza-Klein models
• Waves and causality in higher dimensions
• Supernova constraints on higher-dimensional cosmology with a phantom field
• Sign Switching Dark Energy from a Running Barrow Entropy