Eigenmode Analysis of Galaxy Distributions in Redshift Space

Abstract

Eigenmode analysis is one of the most promising methods of analyzing large data sets in ongoing and near-future galaxy surveys. In such analyses, a fast evaluation of the correlation matrix in arbitrary cosmological models is crucial. The observational effects, including peculiar velocity distortions in redshift space, light-cone effects, selection effects, and effects of the complex shape of the survey geometry, should be taken into account in the analysis. In the framework of the linear theory of gravitational instability, we provide the methodology to quickly compute the correlation matrix. Our methods are not restricted to shallow redshift surveys, arbitrarily deep samples can be dealt with as well. Therefore, our methods are useful in constraining the geometry of the universe and the dark energy component, as well as the power spectrum of galaxies, since ongoing and near-future galaxy surveys probe the universe at intermediate to deep redshifts, z ~ 0.2--5. In addition to the detailed methods to compute the correlation matrix in 3-dimensional redshift surveys, methods to calculate the matrix in 2-dimensional projected samples are also provided. Prospects of applying our methods to likelihood estimation of the cosmological parameters are discussed.

Submitted to ApJ

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Cited by in corpus (9)

• On the Robustness of the Acoustic Scale in the Low-Redshift Clustering of Matter
• Cosmological Parameters from Eigenmode Analysis of Sloan Digital Sky Survey Galaxy Redshifts
• Correlation Function in Deep Redshift Space as a Cosmological Probe
• Tracing The Sound Horizon Scale With Photometric Redshift Surveys
• Baryon Acoustic Oscillations from the SDSS DR10 galaxies angular correlation function
• The nonlinear matter power spectrum
• Non-minimally coupled dark matter: effective pressure and structure formation
• Growth index of matter perturbations in the light of Dark Energy Survey
• Peaks in the cosmological density field: parameter constraints from 2dF Galaxy Redshift Survey data