Prospects for Dark Energy Evolution: a Frequentist Multi-Probe Approach

Abstract

A major quest in cosmology is the understanding of the nature of dark energy. It is now well known that a combination of cosmological probes is required to break the underlying degeneracies on cosmological parameters. In this paper, we present a method, based on a frequentist approach, to combine probes without any prior constraints, taking full account of the correlations in the parameters. As an application, a combination of current SNIa and CMB data with an evolving dark energy component is first compared to other analyses. We emphasise the consequences of the implementation of the dark energy perturbations on the result for a time varying equation of state. The impact of future weak lensing surveys on the measurement of dark energy evolution is then studied in combination with future measurements of the cosmic microwave background and type Ia supernovae. We present the combined results for future mid-term and long-term surveys and confirm that the combination with weak lensing is very powerful in breaking parameter degeneracies. A second generation of experiment is however required to achieve a 0.1 error on the parameters describing the evolution of dark energy.

Submitted to Astronomy & Astrophysics 14 pages, 8 figures

References in corpus (58)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
• Cosmological parameters from SDSS and WMAP
• Cosmological parameters from CMB and other data: a Monte-Carlo approach
• A Phantom Menace? Cosmological consequences of a dark energy component with super-negative equation of state
• A Unified Approach to the Classical Statistical Analysis of Small Signals
• Cosmology and the Fate of Dilatation Symmetry
• Exploring the Expansion History of the Universe
• Accelerating Universes with Scaling Dark Matter
• Weak Gravitational Lensing
• A Line of Sight Approach to Cosmic Microwave Background Anisotropies
• New Constraints on ${\Omega }_M$, ${\Omega }_{\Lambda }$, and w from an Independent Set of Eleven High-Redshift Supernovae Observed with HST
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Angular Power Spectrum
• The 2dF Galaxy Redshift Survey: correlation functions, peculiar velocities and the matter density of the Universe
• Nonlinear evolution of cosmological power spectra
• The Cosmology of Generalized Modified Gravity Models
• Detection of Weak Gravitational Lensing by Large-scale Structure
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Parameter Estimation Methodology
• Probing the dark energy: methods and strategies
• Determination of Inflationary Observables by Cosmic Microwave Background Anisotropy Experiments
• Weak Gravitational Lensing by Large-Scale Structure
• Cosmic Background Anisotropies in CDM Cosmology
• The State of the Dark Energy Equation of State
• The Four-Year COBE Normalization and Large-Scale Structure
• Power Spectrum Tomography with Weak Lensing
• Quintessence and Supergravity
• Weak Lensing and Cosmology
• Future Supernovae observations as a probe of dark energy
• Cosmic Structure Growth and Dark Energy
• New dark energy constraints from supernovae, microwave background and galaxy clustering
• Large Scale Cosmic Microwave Background Anisotropies and Dark Energy
• Weak Lensing and Dark Energy
• The foundations of observing dark energy dynamics with the Wilkinson Microwave Anisotropy Probe
• Precision Cosmology? Not Just Yet
• Dark Synergy: Gravitational Lensing and the CMB
• Limitations in using luminosity distance to determine the equation of state of the universe
• Differentiating between Modified Gravity and Dark Energy
• Measuring the Equation-of-state of the Universe: Pitfalls and Prospects
• Power Spectrum Covariance of Weak Gravitational Lensing
• The Mass Power Spectrum in Quintessence Cosmological Models
• How many dark energy parameters?
• Weak Lensing: Prospects for Measuring Cosmological Parameters
• Effects of Systematic Uncertainties on the Supernova Determination of Cosmological Parameters
• The evolution of galaxy clustering
• Probing quintessence: reconstruction and parameter estimation from supernovae
• Probing the curvature and dark energy
• Weak Lensing from Space III: Cosmological Parameters
• Current status of weak gravitational lensing
• Numerical Simulations of Weak Lensing Measurements
• The Nearby Supernova Factory
• Measurement of Cosmic Shear with the Space Telescope Imaging Spectrograph
• Weak Lensing from Space II: Dark Matter Mapping
• Constraining Dark Energy Evolution with Gravitational Lensing by Large Scale Structures
• Cosmological parameters estimation in the Quintessence Paradigm
• Probing Dark Energy with Supernovae : Bias from the time evolution of the equation of state
• Probing Dark Energy with Supernovae : a concordant or a convergent model?
• Wide-field cosmic shear surveys

Cited by in corpus (12)

• Neutrino masses and cosmology with Lyman-alpha forest power spectrum
• The one-dimensional Ly-alpha forest power spectrum from BOSS
• Lyman-alpha Forests cool Warm Dark Matter
• On model selection forecasting, Dark Energy and modified gravity
• Constraint on neutrino masses from SDSS-III/BOSS Ly$\alpha$ forest and other cosmological probes
• Probing dark energy with the shear-ratio geometric test
• Measuring dark energy properties with 3D cosmic shear
• On using the WMAP distance priors in constraining the time evolving equation of state of dark energy
• Profile Likelihoods in Cosmology: When, Why and How illustrated with $\Lambda$CDM, Massive Neutrinos and Dark Energy
• Constraints on CDM cosmology from galaxy power spectrum, CMB and SNIa evolution
• Bayesian model selection for dark energy using weak lensing forecasts
• Probing for cosmological parameters with LAMOST measurement