http://arxiv.org/abs/1611.08458
The Baryon Acoustic Oscillations (BAO) imprinted a characteristic correlation length in the large-scale structure of the universe that can be used as a standard ruler for mapping out the cosmic expansion history. Here, we discuss the application of the angular two-point correlation function, $w(\theta)$, to a sample of luminous red galaxies of the Sloan Digital Sky Survey (SDSS) and derive two new measurements of the BAO angular scale at $z = 0.235$ and $z = 0.365$. Since noise and systematics may hinder the identification of the BAO signature in the $w – \theta$ plane, we also introduce a potential new method to localize the acoustic bump in a model-independent way. We use these new measurements along with previous data to constrain cosmological parameters of dark energy models and to derive a new estimate of the acoustic scale $r_s$.
J. Alcaniz, G. Carvalho, A. Bernui, et. al.
Mon, 28 Nov 16
29/75
Comments: 9 pages, 5 figures. To appear in the Festschrift in honour of Prof. T. Padmanabhan on the occasion of his 60th birthday
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