Dark energy model selection with current and future data

Abstract

The main goal of the next generation of weak lensing probes is to constrain cosmological parameters by measuring the mass distribution and geometry of the low redshift Universe and thus to test the concordance model of cosmology. A future all-sky tomographic cosmic shear survey with design properties similar to Euclid has the potential to provide the statistical accuracy required to distinguish between different dark energy models. In order to assess the model selection capability of such a probe, we consider the dark energy equation-of-state parameter $w_0$. We forecast the Bayes factor of future observations, in the light of current information from Planck by computing the predictive posterior odds distribution. We find that Euclid is unlikely to overturn current model selection results, and that the future data are likely to be compatible with a cosmological constant model. This result holds for a wide range of priors.

9 pages, 2 figures. arXiv admin note: text overlap with arXiv:1308.5636

References in corpus (21)

• The Tenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Apache Point Observatory Galactic Evolution Experiment
• Supernova Constraints and Systematic Uncertainties from the First 3 Years of the Supernova Legacy Survey
• Dark energy constraints from cosmic shear power spectra: impact of intrinsic alignments on photometric redshift requirements
• A Parameterized Post-Friedmann Framework for Modified Gravity
• Crossing the Phantom Divide with Parameterized Post-Friedmann Dark Energy
• Measuring the effective complexity of cosmological models
• The Third Gravitational Lensing Accuracy Testing (GREAT3) Challenge Handbook
• On model selection forecasting, Dark Energy and modified gravity
• Optimal Surveys for Weak Lensing Tomography
• Full-Sky Weak Lensing Simulation with 70 Billion Particles
• Examining the evidence for dynamical dark energy
• Parametrized Post-Friedmann Signatures of Acceleration in the CMB
• The Masses and Shapes of Dark Matter Halos from Galaxy-Galaxy Lensing in the CFHTLS
• Forecasting the Bayes factor of a future observation
• Cosmology with the Square Kilometre Array
• Model selection forecasts for the spectral index from the Planck satellite
• Should we doubt the cosmological constant?
• When can the Planck satellite measure spectral index running?
• Introducing doubt in Bayesian model comparison
• The power spectrum of systematics in cosmic shear tomography and the bias on cosmological parameters
• Bayesian model selection for dark energy using weak lensing forecasts