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Open Access item Tracing the sound horizon scale with photometric redshift surveys

Authors:Sánchez, E.
Carnero, A.
García-Bellido, Juan
Gaztañaga, Enrique
Simoni, Fernando de
Crocce, Martín
Cabré, Anna
Fosalba, Pablo
Alonso, D.
Keywords:Methods: data analysis, Cosmological parameters, Dark energy, Large-scale structure of Universe
Issue Date:Feb-2011
Royal Astronomical Society
Citation:Monthly Notices of the Royal Astronomical Society 411(1): 277-288 (2011)
Abstract:We propose a new method for the extraction cosmological parameters using the baryon acoustic oscillation (BAO) scale as a standard ruler in deep galaxy surveys with photometric determination of redshifts. The method consists in a simple empirical parametric fit to the angular two-point correlation function ω(θ). It is parametrized as a power law to describe the continuum and as a Gaussian to describe the BAO bump. The location of the Gaussian is used as the basis for the measurement of the sound horizon scale. This method, although simple, actually provides a robust estimation, since the inclusion of the power law and the use of the Gaussian remove the shifts which affect the local maximum. We discuss the effects of projection bias, non-linearities, redshift space distortions and photo-z precision and apply our method to a mock catalogue of the Dark Energy Survey, built upon a large N-body simulation provided by the MICE collaboration. We discuss the main systematic errors associated with our method and show that they are dominated by the photo-z uncertainty.
Description:12 páginas, 13 figuras, 2 tablas.-- El Pdf del artículo es la versión pre-print: arXiv:1006.3226
Publisher version (URL):http://dx.doi.org/10.1111/j.1365-2966.2010.17679.x
E-ISSNmetadata.dc.identifier.doi = DOI:1365-2966
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