2026-04-17T19:00:48Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1195022025-11-21T05:27:17Zcom_2072_1057col_2072_478904col_2072_478917

00925njm 22002777a 4500 dc Beutler, Florian author Seo, Hee-Jong author Ross, Ashley J. author McDonald, P. author Saito, Shun author Bolton, Adam S. author Brownstein, Joel R. author Chuang, Chia-Hsun author Cuesta, Antonio J. author Eisenstein, Daniel J. author Font Ribera, Andreu author Grieb, Jan Niklas author Hand, Nick author Kitaura, Francisco-Shu author Modi, C. author Nichol, Robert C. author Percival, Will J. author Prada, Francisco author Rodríguez Torres, Sergio A. author Roe, Natalie A. author Ross, Nicholas P. author Salazar-Albornoz, Salvador author Sánchez, Ariel G. author Schneider, Donald P. author Slosar, Anze author Tinker, Jeremy L. author Tojeiro, Rita author Vargas Magaña, Mariana author Vázquez, Jose Alberto author 2018-02-01T15:42:26Z 2018-02-01T15:42:26Z 2017-01-21 2018-02-01T15:42:26Z 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 $\zeff = 0.38$, $0.51$ and $0.61$. We demonstrate the reliability of our analysis pipeline using N-body simulations as well as $\sim 1000$ 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 $D_A(z)$ and the Hubble parameter $H(z)$ separately. We obtain two independent $1.6\%$ and $1.5\%$ constraints on $D_A(z)$ and $2.9\%$ and $2.3\%$ constraints on $H(z)$ for the low ($\zeff=0.38$) and high ($\zeff=0.61$) redshift bin, respectively. We obtain two independent $1\%$ and $0.9\%$ constraints on the angular averaged distance $D_V(z)$, when ignoring the Alcock-Paczynski effect. The detection significance of the BAO signal is of the order of $8\sigma$ (post-reconstruction) for each of the three redshift bins. Our results are in good agreement with the Planck prediction within $\Lambda$CDM. 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~\citet{Alam2016} to produce the final cosmological constraints from BOSS. Cúmuls de galàxies Espectroscòpia Clusters of galaxies Spectrum analysis The Clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: baryon acoustic oscillations in the Fourier space