Joint cosmological parameters forecast from CFHTLS-cosmic shear and CMB data

Abstract

We present a prospective analysis of a combined cosmic shear and cosmic microwave background data set, focusing on a Canada France Hawaii Telescope Legacy Survey (CFHTLS) type lensing survey and the current WMAP-1 year and CBI data. We investigate the parameter degeneracies and error estimates of a seven parameters model, for the lensing alone as well as for the combined experiments. The analysis is performed using a Monte Carlo Markov Chain calculation, allowing for a more realistic estimate of errors and degeneracies than a Fisher matrix approach. After a detailed discussion of the relevant statistical techniques, the set of the most relevant 2 and 3-dimensional lensing contours are given. It is shown that the combined cosmic shear and CMB is particularly efficient to break some parameter degeneracies. The principal components directions are computed and it is found that the most orthogonal contours between the two experiments are for the parameter pairs (Omega_m,sigma_8), (h,ns) and (ns,nrun), where ns and nrun are the slope of the primordial mass power spectrum and the running spectral index respectively. It is shown that an improvement of a factor 2 is expected on the running spectral index from the combined data sets. Forecasts for error improvements from a wide field space telescope lensing survey are also given.

16 pages, 11 figures. Submitted to Astronomy & Astrophysics

References in corpus (28)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Efficient Computation of CMB anisotropies in closed FRW models
• Cosmological parameters from SDSS and WMAP
• Cosmological parameters from CMB and other data: a Monte-Carlo approach
• Weak Gravitational Lensing
• Stable clustering, the halo model and nonlinear cosmological power spectra
• Karhunen-Loeve eigenvalue problems in cosmology: how should we tackle large data sets?
• Wilkinson Microwave Anisotropy Probe (WMAP) First Year Observations: TE Polarization
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Angular Power Spectrum
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Parameter Estimation Methodology
• Probing the Universe with Weak Lensing
• Weak Gravitational Lensing by Large-Scale Structure
• Cosmic Confusion: Degeneracies among Cosmological Parameters Derived from Measurements of Microwave Background Anisotropies
• Cosmological parameters from lensing power spectrum and bispectrum tomography
• Cosmic Complementarity: Joint Parameter Estimation from CMB Experiments and Redshift Surveys
• Cosmological Model Predictions for Weak Lensing: Linear and Nonlinear Regimes
• The Anisotropy of the Microwave Background to l = 3500: Mosaic Observations with the Cosmic Background Imager
• Weak Lensing and Dark Energy
• Analysis of two-point statistics of cosmic shear: I. Estimators and covariances
• II: Bayesian Methods for Cosmological Parameter Estimation from Cosmic Microwave Background Measurements
• Likelihood Analysis of Cosmic Shear on Simulated and VIRMOS-DESCART Data
• Separating the Early Universe from the Late Universe: cosmological parameter estimation beyond the black box
• Joint CMB and Weak Lensing Analysis; Physically Motivated Constraints on Cosmological Parameters
• Combining cosmological datasets: hyperparameters and Bayesian evidence
• The effect of imperfect corrections of PSF anisotropy on cosmic shear measurements
• Weak Lensing and CMB: Parameter forecasts including a running spectral index
• CMBfit: Rapid WMAP likelihood calculations with normal parameters
• Normal Parameters for an Analytic Description of the CMB Cosmological Parameter Likelihood

Cited by in corpus (25)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Weak Gravitational Lensing
• Gravitational Lensing
• Cosmology with Weak Lensing Surveys
• Detection of large scale intrinsic ellipticity-density correlation from the Sloan Digital Sky Survey and implications for weak lensing surveys
• First cosmic shear results from the Canada-France-Hawaii Telescope Wide Synoptic Legacy Survey
• Simultaneous measurement of cosmology and intrinsic alignments using joint cosmic shear and galaxy number density correlations
• Projection effects in cluster mass estimates : the case of MS2137
• Cosmological weak lensing with the HST GEMS survey
• Cosmic shear analysis of archival HST/ACS data: I. Comparison of early ACS pure parallel data to the HST/GEMS Survey
• GaBoDS: The Garching-Bonn Deep Survey: VI. Cosmic shear analysis
• Cosmic shear as a tool for precision cosmology: minimising intrinsic galaxy alignment-lensing interference
• Tracking quintessence by cosmic shear - Constraints from VIRMOS-Descart and CFHTLS and future prospects
• Constraining $f(T,\mathcal{T})$ gravity models using type Ia supernovae
• Relative clustering and the joint halo occupation distribution of red-sequence and blue-cloud galaxies in COMBO-17
• Effects of the complex mass distribution of dark matter halos on weak lensing cluster surveys
• Effects of Self-Calibration of Intrinsic Alignment on Cosmological Parameter Constraints from Future Cosmic Shear Surveys
• Constraints on sigma_8 from galaxy clustering in N-body simulations and semi-analytic models
• Cosmological constraints on a unified dark matter-energy scalar field model with fast transition
• Projection effects of large-scale structures on weak-lensing peak abundances
• Principal Component Analysis of Weak Lensing Surveys
• LeMoMaF: Lensed Mock Map Facility
• Cosmic Degeneracies III: N-body Simulations of Interacting Dark Energy with Non-Gaussian Initial Conditions
• Cosmology with Weak Lensing Surveys
• Dark energy constraints and correlations with systematics from CFHTLS weak lensing, SNLS supernovae Ia and WMAP5