Planck priors for dark energy surveys

Abstract

Although cosmic microwave background (CMB) anisotropy data alone cannot constrain simultaneously the spatial curvature and the equation of state of dark energy, CMB data provide a valuable addition to other experimental results. However computing a full CMB power spectrum with a Boltzmann code is quite slow; for instance if we want to work with many dark energy and/or modified gravity models, or would like to optimize experiments where many different configurations need to be tested, it is possible to adopt a quicker and more efficient approach. In this paper we consider the compression of the projected Planck CMB data into four parameters, R (scaled distance to last scattering surface), l_a (angular scale of sound horizon at last scattering), Omega_b h^2 (baryon density fraction) and n_s (powerlaw index of primordial matter power spectrum), all of which can be computed quickly. We show that, although this compression loses information compared to the full likelihood, such information loss becomes negligible when more data is added. We also demonstrate that the method can be used for scalar field dark energy independently of the parametrisation of the equation of state, and discuss how this method should be used for other kinds of dark energy models.

8 pages, 3 figures, 4 tables

References in corpus (27)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Efficient Computation of CMB anisotropies in closed FRW models
• Cosmological parameters from CMB and other data: a Monte-Carlo approach
• Accelerating Universes with Scaling Dark Matter
• Small Scale Cosmological Perturbations: An Analytic Approach
• Probing Dark Energy with Baryonic Acoustic Oscillations from Future Large Galaxy Redshift Surveys
• The Cosmology of Generalized Modified Gravity Models
• Quantum effects can render w<-1 on cosmological scales
• Robust Dark Energy Constraints from Supernovae, Galaxy Clustering, and Three-Year Wilkinson Microwave Anisotropy Probe Observations
• Observational Constraints on Dark Energy and Cosmic Curvature
• On cosmic acceleration without dark energy
• The foundations of observing dark energy dynamics with the Wilkinson Microwave Anisotropy Probe
• Dark Energy versus Modified Gravity
• Gauss-Bonnet Quintessence: Background Evolution, Large Scale Structure and Cosmological Constraints
• Model-Independent Constraints on Dark Energy Density from Flux-averaging Analysis of Type Ia Supernova Data
• Quantum Stability of a w < - 1 Phase of Cosmic Acceleration
• A Sudden Gravitational Transition
• Present and future evidence for evolving dark energy
• Holographic Foam, Dark Energy and Infinite Statistics
• Universal fitting formulae for baryon oscillation surveys
• The Location of CMB Peaks in a Universe with Dark Energy
• Beyond the perfect fluid hypothesis for dark energy equation of state
• Efficient Cosmological Parameter Estimation with Hamiltonian Monte Carlo
• Dark Energy Constraints from Baryon Acoustic Oscillations
• Testing Cosmology with Cosmic Sound Waves
• Model selection forecasts for the spectral index from the Planck satellite
• Observational Bounds on Modified Gravity Models

Cited by in corpus (40)

• Cosmology and Fundamental Physics with the Euclid Satellite
• Cosmology and fundamental physics with the Euclid satellite
• Gravitationally lensed quasars and supernovae in future wide-field optical imaging surveys
• Planck 2015 results. XIV. Dark energy and modified gravity
• Ultra-high precision cosmology from gravitational waves
• Testing backreaction effects with observations
• Dark Energy from the Thermal Sunyaev Zeldovich Power Spectrum
• Neutrino constraints from future nearly all-sky spectroscopic galaxy surveys
• Designing a space-based galaxy redshift survey to probe dark energy
• Observational Evidence of the Accelerated Expansion of the Universe
• How flat can you get? A model comparison perspective on the curvature of the Universe
• Model-independent cosmological constraints from the CMB
• A Completely Regular Quantum Stress Tensor with $w<-1$
• Constraining the Cosmology of the Phantom Brane using Distance Measures
• Extending the supernova Hubble diagram to z~1.5 with the Euclid space mission
• Exploring uncertainties in dark energy constraints using current observational data with Planck 2015 distance priors
• Toward More Realistic Forecasting of Dark Energy Constraints from Galaxy Redshift Surveys
• Cosmological parameters after WMAP5: forecasts for Planck and future galaxy surveys
• Distance Priors from \emph{Planck} 2015 data
• Bayesian evidence for $\alpha$-attractor dark energy models
• Constraining the $\Lambda$CDM and Galileon models with recent cosmological data
• Growth of matter perturbations in the extended viscous dark energy models
• Improving sampling and calibration of GRBs as distance indicators
• Probing a Steep EoS for Dark Energy with latest observations
• Optimizing baryon acoustic oscillation surveys II: curvature, redshifts, and external datasets
• Constraints on Steep Equation of State for the Dark Energy using BAO
• Testing cosmic acceleration for $w(z)$ parameterizations using $f_{gas}$ measurements in galaxy clusters
• Robust constraints on dark energy and gravity from galaxy clustering data
• Extended $\Lambda$CDM model and viscous dark energy: A Bayesian analysis
• Dark energy constraints from a space-based supernova survey
• A single parameterization for dark energy and modified gravity models
• Imprint of a Steep Equation of State in the growth of structure
• Cosmological forecasts from photometric measurements of the angular correlation function
• Non-linear Structure Formation for Dark Energy Models with a Steep Equation of State
• Probing Quintessence Potential with Future Cosmological Surveys
• Endowing $\mathbf{\Lambda }$ with a dynamic nature: constraints in a spatially curved Universe
• Implications of Dynamical Dark Energy in the expansion of the Universe and the Structure Formation
• Probing the independence within the dark sector in the fluid approximation
• Linear and non-linear Modified Gravity forecasts with future surveys
• Improving cosmological constraints via galaxy intrinsic alignment in full-shape analysis