A 2% Distance to z=0.35 by Reconstructing Baryon Acoustic Oscillations - II: Fitting Techniques

Abstract

We present results from fitting the baryon acoustic oscillation (BAO) signal in the correlation function obtained from the first application of reconstruction to a galaxy redshift survey, namely, the Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7) luminous red galaxy (LRG) catalogue. We also introduce more careful approaches for deriving a suitable covariance matrix and fitting model for galaxy correlation functions. These all aid in obtaining a more accurate measurement of the acoustic scale and its error. We validate our reconstruction, covariance matrix and fitting techniques on 160 mock catalogues derived from the LasDamas simulations in real and redshift space. We then apply these techniques to the DR7 LRG sample and find that the error on the acoustic scale decreases from ~3.5% before reconstruction to ~1.9% after reconstruction. This factor of 1.8 reduction in the error is equivalent to the effect of tripling the survey volume. We also see an increase in our BAO detection confidence from ~3-sigma to ~4-sigma after reconstruction with our confidence level in measuring the correct acoustic scale increasing from ~3-sigma to ~5-sigma. Using the mean of the acoustic scale probability distributions produced from our fits, we find D_v/r_s = 8.89 +/- 0.31 before reconstruction and 8.88 +/- 0.17 after reconstruction.

24 pages, 20 figures, MNRAS submitted. This is the second of a series of three papers. See http://www.astro.yale.edu/padmanabhan/dr7recon/ for associated data files and figures. v2: Minor corrections to figures 4 & 5; no changes to numerical results

References in corpus (21)

• Cosmological Constraints from the SDSS Luminous Red Galaxies
• Measuring the Baryon Acoustic Oscillation scale using the SDSS and 2dFGRS
• A 2% Distance to z=0.35 by Reconstructing Baryon Acoustic Oscillations - I : Methods and Application to the Sloan Digital Sky Survey
• Improving Cosmological Distance Measurements by Reconstruction of the Baryon Acoustic Peak
• Resumming Cosmological Perturbations via the Lagrangian Picture: One-loop Results in Real Space and in Redshift Space
• Nonlinear Evolution of Baryon Acoustic Oscillations
• On the Robustness of the Acoustic Scale in the Low-Redshift Clustering of Matter
• The detectability of baryonic acoustic oscillations in future galaxy surveys
• `Eppur Si Muove': On The Motion of the Acoustic Peak in the Correlation Function
• Non-linear structure formation and the acoustic scale
• Measuring the matter density using baryon oscillations in the SDSS
• Reconstructing Baryon Oscillations: A Lagrangian Theory Perspective
• Simulations of Baryon Acoustic Oscillations II: Covariance matrix of the matter power spectrum
• Calibrating the Baryon Oscillation Ruler for Matter and Halos
• Simulations of Baryon Oscillations
• Galaxy Bias and its Effects on the Baryon Acoustic Oscillations Measurements
• A 2% Distance to z = 0.35 by Reconstructing Baryon Acoustic Oscillations - III : Cosmological Measurements and Interpretation
• Distance, Growth Factor, and Dark Energy Constraints from Photometric Baryon Acoustic Oscillation and Weak Lensing Measurements
• Systematic effects in the sound horizon scale measurements
• Forecasting the Dark Energy Measurement with Baryon Acoustic Oscillations: Prospects for the LAMOST surveys
• Signatures of the Baryon Acoustic Oscillations on 21cm Emission Background

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