Work

Baryon Oscillations and Consistency Tests for Photometrically Determined Redshifts of Very Faint Galaxies

Year: 2006

Type: article

Abstract: We investigate the impact of uncertainties in the photometric redshift error probability distribution on dark energy constraints from detection of baryon acoustic oscillations in galaxy power spectra. We also consider the prospects for determining the photometric redshift error probability distribution from the galaxy power spectra themselves. We find that although a sufficiently precise determination of redshift biases δ z and variances σ is not possible, a strong consistency test is. For example, if σ z is known to 1%, then any redshift bias δ z greater than 0.008 will be detectable in the proposed survey of the Large Synoptic Survey Telescope through baryon oscillations. We speculate about the utility of this test for interpretation of cosmic shear data.

Source: The Astrophysical Journal

DOI: 10.1086/503622

Authors: Hu Zhan, Lloyd Knox

Institution: University of California, Davis

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: bronze

Funders: National Science Foundation, National Aeronautics and Space Administration, McGill University

Awards: The Deep Lens Survey, ANALYSIS & INTERPRETATION OF CMB DATA (LTSA 2000), Theoretical Investigations of SZ Effects and Small-scale CMB Polarization and Temperature Anisotropies