The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: angular clustering tomography and its cosmological implications

DOI: 
10.1093/mnras/stx633
Publication date: 
01/07/2017
Main author: 
Salazar-Albornoz, Salvador
IAA authors: 
Prada, Francisco
Authors: 
Salazar-Albornoz, Salvador;Sánchez, Ariel G.;Grieb, Jan Niklas;Crocce, Martin;Scoccimarro, Roman;Alam, Shadab;Beutler, Florian;Brownstein, Joel R.;Chuang, Chia-Hsun;Kitaura, Francisco-Shu;Olmstead, Matthew D.;Percival, Will J.;Prada, Francisco;Rodríguez-Torres, Sergio;Samushia, Lado;Tinker, Jeremy;Thomas, Daniel;Tojeiro, Rita;Wang, Yuting;Zhao, Gong-bo
Journal: 
Monthly Notices of the Royal Astronomical Society
Refereed: 
Yes
Publication type: 
Article
Volume: 
468
Pages: 
2938-2956
Abstract: 

We investigate the cosmological implications of studying galaxy clustering using a tomographic approach applied to the final Baryon Oscillation Spectroscopic Survey (BOSS) DR12 galaxy sample, including both auto- and cross-correlation functions between redshift shells. We model the signal of the full shape of the angular correlation function, ω(θ), in redshift bins using state-of-the-art modelling of non-linearities, bias and redshift-space distortions. We present results on the redshift evolution of the linear bias of BOSS galaxies, which cannot be obtained with traditional methods for galaxy-clustering analysis. We also obtain constraints on cosmological parameters, combining this tomographic analysis with measurements of the cosmic microwave background (CMB) and Type Ia supernova (SNIa). We explore a number of cosmological models, including the standard Λ cold dark matter model and its most interesting extensions, such as deviations from w<SUB>DE</SUB> = -1, non-minimal neutrino masses, spatial curvature and deviations from general relativity (GR) using the growth-index γ parametrization. These results are, in general, comparable to the most precise present-day constraints on cosmological parameters, and show very good agreement with the standard model. In particular, combining CMB, ω(θ) and SNIa, we find a value of w<SUB>DE</SUB> consistent with -1 to a precision better than 5 per cent when it is assumed to be constant in time, and better than 6 per cent when we also allow for a spatially curved Universe.

Database: 
ADS
SCOPUS
URL: 
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85023756380&doi=10.1093%2fmnras%2fstx633&partnerID=40&md5=bf948b8f445fc8167afc3c9ebd3662a6
ADS Bibcode: 
2017MNRAS.468.2938S
Keywords: 
cosmological parameters;large-scale structure of Universe;Astrophysics - Cosmology and Nongalactic Astrophysics;Astrophysics - Instrumentation and Methods for Astrophysics