The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in Fourier-space

Publication date: 
Main author: 
Beutler, Florian
IAA authors: 
Prada, Francisco
Beutler, Florian;Seo, Hee-Jong;Ross, Ashley J.;McDonald, Patrick;Saito, Shun;Bolton, Adam S.;Brownstein, Joel R.;Chuang, Chia-Hsun;Cuesta, Antonio J.;Eisenstein, Daniel J.;Font-Ribera, Andreu;Grieb, Jan Niklas;Hand, Nick;Kitaura, Francisco-Shu;Modi, Chirag;Nichol, Robert C.;Percival, Will J.;Prada, Francisco;Rodriguez-Torres, Sergio;Roe, Natalie A.;Ross, Nicholas P.;Salazar-Albornoz, Salvador;Sánchez, Ariel G.;Schneider, Donald P.;Slosar, Anže;Tinker, Jeremy;Tojeiro, Rita;Vargas-Magaña, Mariana;Vazquez, Jose A.
Monthly Notices of the Royal Astronomical Society
Publication type: 
We analyse the Baryon Acoustic Oscillation (BAO) signal of the final Baryon Oscillation Spectroscopic Survey (BOSS) data release (DR12). Our analysis is performed in Fourier-space, using the power spectrum monopole and quadrupole. The dataset includes 1 198 006 galaxies over the redshift range 0.2 〈 z 〈 0.75. We divide this dataset into three (overlapping) redshift bins with the effective redshifts z<SUB>eff</SUB> = 0.38, 0.51 and 0.61. We demonstrate the reliability of our analysis pipeline using N-body simulations as well as ̃1000 MultiDark-Patchy mock catalogues, which mimic the BOSS-DR12 target selection. We apply density field reconstruction to enhance the BAO signal-to-noise ratio. By including the power spectrum quadrupole we can separate the line-of-sight and angular modes, which allows us to constrain the angular diameter distance D<SUB>A</SUB>(z) and the Hubble parameter H(z) separately. We obtain two independent 1.6% and 1.5% constraints on D<SUB>A</SUB>(z) and 2.9% and 2.3% constraints on H(z) for the low (z<SUB>eff</SUB> = 0.38) and high (z<SUB>eff</SUB> = 0.61) redshift bin, respectively. We obtain two independent 1% and 0.9% constraints on the angular averaged distance D<SUB>V</SUB>(z), when ignoring the Alcock-Paczynski effect. The detection significance of the BAO signal is of the order of 8σ (post-reconstruction) for each of the three redshift bins. Our results are in good agreement with the Planck prediction within ΛCDM. This paper is part of a set that analyses the final galaxy clustering dataset from BOSS. The measurements and likelihoods presented here are combined with others in Alam et al. (2016) to produce the final cosmological constraints from BOSS.
ADS Bibcode: 
surveys;cosmology: observations;dark energy;gravitation;cosmological parameters;large scale structure of Universe;Astrophysics - Cosmology and Nongalactic Astrophysics