A method to extract the redshift distortions beta parameter in configuration space from minimal cosmological assumptions
arXiv:1101.2608 · doi:10.1088/0004-637X/757/2/131
Abstract
We present a method to extract the redshift-space distortions beta parameter in configuration space with a minimal set of cosmological assumptions. We show that a novel combination of the observed monopole and quadrupole correlation functions can remove efficiently the impact of mild non linearities and redshift errors. The method offers a series of convenient properties: it does not depend on the theoretical linear correlation function, the mean galaxy density is irrelevant, only convolutions are used, there is no explicit dependence on linear bias. Analyses based on dark matter N-body simulations and Fisher matrix demonstrate that errors of a few percent on beta are possible with a full sky, 1(Gpc/h)^3 survey centered at a redshift of unity and with negligible shot noise. We also find a baryonic feature in the normalized quadrupole in configuration space that should complicate the extraction of the growth parameter from the linear theory asymptote, but that does not have a major impact with our method.
Version accepted on ApJ. Included test with N-body results. Conclusions unchanged. References added. 10 pages, 4 figures
References in corpus (18)
- Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
- Cosmological Constraints from the SDSS Luminous Red Galaxies
- A test of the nature of cosmic acceleration using galaxy redshift distortions
- The 6dF Galaxy Survey: z \approx 0 measurement of the growth rate and sigma_8
- The WiggleZ Dark Energy Survey: the growth rate of cosmic structure since redshift z=0.9
- Resumming Cosmological Perturbations via the Lagrangian Picture: One-loop Results in Real Space and in Redshift Space
- The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: measurements of the growth of structure and expansion rate at z=0.57 from anisotropic clustering
- Interpreting large-scale redshift-space distortion measurements
- Testing cosmological structure formation using redshift-space distortions
- Towards an accurate model of the redshift space clustering of halos in the quasilinear regime
- Large-Scale Anisotropic Correlation Function of SDSS Luminous Red Galaxies
- Clustering of luminous red galaxies I: large scale redshift space distortions
- Redshift-Space Distortions with the Halo Occupation Distribution II: Analytic Model
- Improving measurements of H(z) and Da(z) by analyzing clustering anisotropies
- Systematic Effects on Determination of the Growth Factor from Redshift-space Distortions
- Nonlinear Biasing and Redshift-Space Distortions in Lagrangian Resummation Theory and N-body Simulations
- What is the best way to measure baryonic acoustic oscillations?
- Cosmology with clustering anisotropies: disentangling dynamic and geometric distortions in galaxy redshift surveys