Decomposition of Spectra from Redshift Distortion Maps

Abstract

We develop an optimized technique to extract density--density and velocity--velocity spectra out of observed spectra in redshift space. The measured spectra of the distribution of halos from redshift distorted mock map are binned into 2--dimensional coordinates in Fourier space so as to be decomposed into both spectra using angular projection dependence. With the threshold limit introduced to minimize nonlinear suppression, the decomposed velocity--velocity spectra are reasonably well measured up to scale k=0.07 h/Mpc, and the measured variances using our method are consistent with errors predicted from a Fisher matrix analysis. The detectability is extendable to k\sim 0.1 h/Mpc with more conservative bounds at the cost of weakened constraint.

5 pages and 4 figures, submitted to MNRAS

References in corpus (9)

• Cosmological Constraints from the SDSS Luminous Red Galaxies
• A test of the nature of cosmic acceleration using galaxy redshift distortions
• Generation of Vorticity and Velocity Dispersion by Orbit Crossing
• Large-Scale Anisotropic Correlation Function of SDSS Luminous Red Galaxies
• The Vimos VLT Deep Survey: Global properties of 20000 galaxies in the I_AB<=22.5 WIDE survey
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• Decomposition of Spectra from Redshift Distortion Maps
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• A Perturbative Approach to the Redshift Space Power Spectrum: Beyond the Standard Model
• Where are the Luminous Red Galaxies (LRGs)? Using correlation measurements and lensing to relate LRGs to dark matter halos
• Precision modeling of redshift-space distortions from multi-point propagator expansion
• Baryon Acoustic Oscillations in 2D II: Redshift-space halo clustering in N-body simulations
• Beyond consistency test of gravity with redshift-space distortions at quasi-linear scales
• Using galaxy-galaxy weak lensing measurements to correct the Finger-of-God
• Theoretical Accuracy in Cosmological Growth Estimation
• Measuring Coherent Motions in the Universe
• Likelihood reconstruction method of real-space density and velocity power spectra from a redshift galaxy survey
• Decomposition of Spectra from Redshift Distortion Maps
• Coherent Combination of Baryon Acoustic Oscillation Statistics and Peculiar Velocity Measurements from Redshift Survey
• Chasing Unbiased Spectra of the Universe
• Direct Determination of Expansion History Using Redshift Distortions
• Semi-analytical Study on the Generic Degeneracy for Galaxy Clustering Measurements