2026-04-18T07:09:27Zhttps://recercat.cat/oai/request

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

The Clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: baryon acoustic oscillations in the Fourier space Beutler, Florian Seo, Hee-Jong Ross, Ashley J. McDonald, P. 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, C. Nichol, Robert C. Percival, Will J. Prada, Francisco Rodríguez Torres, Sergio A. Roe, Natalie A. Ross, Nicholas P. Salazar-Albornoz, Salvador Sánchez, Ariel G. Schneider, Donald P. Slosar, Anze Tinker, Jeremy L. Tojeiro, Rita Vargas Magaña, Mariana Vázquez, Jose Alberto Cúmuls de galàxies Espectroscòpia Clusters of galaxies Spectrum analysis 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. 2018-02-01T15:42:26Z 2018-02-01T15:42:26Z 2017-01-21 2018-02-01T15:42:26Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 0035-8711 https://hdl.handle.net/2445/119502 665756 eng Reproducció del document publicat a: https://doi.org/10.1093/mnras/stw2373 Monthly Notices of the Royal Astronomical Society, 2017, vol. 464, num. 3, p. 3409-3430 https://doi.org/10.1093/mnras/stw2373 (c) Beutler, F. et al., 2017 info:eu-repo/semantics/openAccess 22 p. application/pdf application/pdf Royal Astronomical Society Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))