The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: combining correlated Gaussian posterior distributions

DOI: 
10.1093/mnras/stw2495
Publication date: 
01/01/2017
Main author: 
Sánchez, Ariel G.
IAA authors: 
Prada, Francisco
Authors: 
Sánchez, Ariel G.;Grieb, Jan Niklas;Salazar-Albornoz, Salvador;Alam, Shadab;Beutler, Florian;Ross, Ashley J.;Brownstein, Joel R.;Chuang, Chia-Hsun;Cuesta, Antonio J.;Eisenstein, Daniel J.;Kitaura, Francisco-Shu;Percival, Will J.;Prada, Francisco;Rodríguez-Torres, Sergio;Seo, Hee-Jong;Tinker, Jeremy;Tojeiro, Rita;Vargas-Magaña, Mariana;Vazquez, Jose A.;Zhao, Gong-Bo
Journal: 
Monthly Notices of the Royal Astronomical Society
Refereed: 
Yes
Publication type: 
Article
Volume: 
464
Pages: 
1493-1501
Abstract: 
The cosmological information contained in anisotropic galaxy clustering measurements can often be compressed into a small number of parameters whose posterior distribution is well described by a Gaussian. We present a general methodology to combine these estimates into a single set of consensus constraints that encode the total information of the individual measurements, taking into account the full covariance between the different methods. We illustrate this technique by applying it to combine the results obtained from different clustering analyses, including measurements of the signature of baryon acoustic oscillations and redshift-space distortions, based on a set of mock catalogues of the final SDSS-III Baryon Oscillation Spectroscopic Survey (BOSS). Our results show that the region of the parameter space allowed by the consensus constraints is smaller than that of the individual methods, highlighting the importance of performing multiple analyses on galaxy surveys even when the measurements are highly correlated. This paper is part of a set that analyses the final galaxy clustering data set from BOSS. The methodology presented here is used in Alam et al. to produce the final cosmological constraints from BOSS.
Database: 
ADS
SCOPUS
URL: 
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85014648286&doi=10.1093%2fmnras%2fstw2495&partnerID=40&md5=973786bfce7e9e83d6af5daa2583c185
ADS Bibcode: 
2017MNRAS.464.1493S
Keywords: 
cosmological parameters;large-scale structure of Universe;Astrophysics - Cosmology and Nongalactic Astrophysics