A 2% Bao Distance Measurement From Density-field Reconstruction In The Sdss

Details A 2% Bao Distance Measurement From Density-field Reconstruction In The Sdss A 2% Bao Distance Measurement From Density-field Reconstruction In The Sdss

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21934202x&link_type=abstract

American Astronomical Society, AAS Meeting #219, #342.02

Astronomy and Astrophysics

Astronomy

Scientific paper

We present the first application of density-field reconstruction to the Baryon Acoustic Oscillations (BAO) signal using the luminous red galaxy sample in the seventh data release of the Sloan Digital Sky Survey. Reconstruction was developed to reduce the uncertainties on the measured BAO scale. We also introduce a new method for estimating a smooth covariance matrix and perform detailed tests to verify the robustness of our fitting model. We find that the error on the acoustic scale improves from 3.4% before reconstruction to 1.9% after reconstruction at z=0.35, a decrease equivalent to tripling the survey volume. This marks the most accurate and robust measurement of the z=0.35 acoustic scale to date.

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