Prospects in Constraining the Dark Energy Potential
arXiv:0806.1871 · doi:10.1088/1475-7516/2008/08/023
Abstract
We generalize to non-flat geometries the formalism of Simon et al. (2005) to reconstruct the dark energy potential. This formalism makes use of quantities similar to the Horizon-flow parameters in inflation, can, in principle, be made non-parametric and is general enough to be applied outside the simple, single scalar field quintessence. Since presently available and forthcoming data do not allow a non-parametric and exact reconstruction of the potential, we consider a general parametric description in term of Chebyshev polynomials. We then consider present and future measurements of H(z), Baryon Acoustic Oscillations surveys and Supernovae type 1A surveys, and investigate their constraints on the dark energy potential. We find that, relaxing the flatness assumption increases the errors on the reconstructed dark energy evolution but does not open up significant degeneracies, provided that a modest prior on geometry is imposed. Direct measurements of H(z), such as those provided by BAO surveys, are crucially important to constrain the evolution of the dark energy potential and the dark energy equation of state, especially for non-trivial deviations from the standard LambdaCDM model.
22 pages, 7 figures. 2 references corrected
References in corpus (13)
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Likelihoods and Parameters from the WMAP data
- Cosmological Constraints from the SDSS Luminous Red Galaxies
- Observational Constraints on the Nature of the Dark Energy: First Cosmological Results from the ESSENCE Supernova Survey
- Reconstructing Dark Energy
- A Parameterized Post-Friedmann Framework for Modified Gravity
- Report of the Dark Energy Task Force
- The shape of the SDSS DR5 galaxy power spectrum
- Lemaitre-Tolman-Bondi model and accelerating expansion
- Dynamical Dark Energy or Simply Cosmic Curvature?
- Observational signatures of Jordan-Brans-Dicke theories of gravity
- Luminosity Function Constraints on the Evolution of Massive Red Galaxies Since z~0.9
- Dynamical behavior of generic quintessence potentials: constraints on key dark energy observables