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arXiv · 1709.00271

Measuring the transverse baryonic acoustic scale from the SDSS DR11 galaxies

G. C. Carvalho·A. Bernui·M. Benetti·J. C. Carvalho·E. de Carvalho·J. S. Alcaniz
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Abstract

We report five measurements of the transverse baryonic acoustic scale, $\theta_{BAO}$, obtained from the angular two-point correlation function calculation for Luminous Red Galaxies of the eleventh data release of the Sloan Digital Sky Survey (SDSS). Each measurement has been obtained by considering a thin redshift shell ($\delta z = 0.01$ and $0.02$) in the interval $ z \in [0.565, 0.660] $, which contains a large density of galaxies ($\sim 20,000$ galaxies/redshift shell). Differently from the three-dimensional Baryon Acoustic Oscillations (BAO) measurements, these data points are obtained almost model-independently and provide a Cosmic Microwave Background (CMB)-independent way to estimate the sound horizon $ r_s $. Assuming a time-dependent equation-of-state parameter for the dark energy, we also discuss constraints on the main cosmological parameters from $\theta_{BAO}$ and CMB data.

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G. C. Carvalho, A. Bernui, M. Benetti, J. C. Carvalho, E. de Carvalho, J. S. Alcaniz. 2017-09-01. Measuring the transverse baryonic acoustic scale from the SDSS DR11 galaxies. https://doi.org/10.1016/j.astropartphys.2020.102432

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