Chasing Unbiased Spectra of the Universe

Abstract

The cosmological power spectrum of the coherent matter flow is measured exploiting an improved prescription for the apparent anisotropic clustering pattern in redshift space. New statistical analysis is presented to provide an optimal observational platform to link the improved redshift distortion theoretical model to future real datasets. The statistical power as well as robustness of our method are tested against 60 realizations of 8 Gpc/h^3 dark matter simulation maps mocking the precision level of upcoming wide--deep surveys. We showed that we can accurately extract the velocity power spectrum up to quasi linear scales of k~0.1 h/Mpc at z = 0.35 and up to k~0.15 h/Mpc at higher redshifts within a couple of percentage precision level. Our understanding of redshift space distortion is proved to be appropriate for precision cosmology, and our statistical method will guide us to righteous path to meet the real world.

9 pages, 7 figures

References in corpus (15)

• A test of the nature of cosmic acceleration using galaxy redshift distortions
• The Large Scale Structure of f(R) Gravity
• A discriminating probe of gravity at cosmological scales
• Confirmation of general relativity on large scales from weak lensing and galaxy velocities
• Testing cosmological structure formation using redshift-space distortions
• Observational Tests of Modified Gravity
• RegPT: Direct and fast calculation of regularized cosmological power spectrum at two-loop order
• A Closure Theory for Non-linear Evolution of Cosmological Power Spectra
• Modelling redshift space distortions in hierarchical cosmologies
• Differentiating dark energy and modified gravity with galaxy redshift surveys
• Perturbation Theory Reloaded II: Non-linear Bias, Baryon Acoustic Oscillations and Millennium Simulation In Real Space
• Consistency test of general relativity from large scale structure of the Universe
• Peculiar Velocity Decomposition, Redshift Space Distortion and Velocity Reconstruction in Redshift Surveys - I. The Methodology
• Joint Analysis of Gravitational Lensing, Clustering and Abundance: Toward the Unification of Large-Scale Structure Analysis
• Testing gravity using the growth of large scale structure in the Universe

Cited by in corpus (4)

• DESI and other dark energy experiments in the era of neutrino mass measurements
• Broadband Alcock-Paczynski test exploiting redshift distortions
• Cosmological Constraints from the Anisotropic Clustering Analysis using BOSS DR9
• Improved Methods for Estimating Peculiar Velocity Correlation Functions Using Volume Weighting