Portal de Periódicos da CAPES

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

2016; Oxford University Press; Volume: 466; Issue: 2 Linguagem: Inglês

10.1093/mnras/stw3298

1365-2966

Florian Beutler, Hee‐Jong Seo, Shun Saito, Chia-Hsun Chuang, Antonio J. Cuesta, Daniel J. Eisenstein, Héctor Gil-Marín, Jan Niklas Grieb, Nick Hand, Francisco-Shu Kitaura, Chirag Modi, Robert C. Nichol, Matthew D. Olmstead, Will J. Percival, Francisco Prada, Ariel G. Sánchez, Sergio Rodríguez-Torres, Ashley J. Ross, Nicholas P. Ross, Donald P. Schneider, Jeremy L. Tinker, Rita Tojeiro, M. Vargas-Magaña,

Astronomy and Astrophysical Research

We investigate the anisotropic clustering of the Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 12 (DR12) sample, which consists of $1\,198\,006$ galaxies in the redshift range $0.2 < z < 0.75$ and a sky coverage of $10\,252\,$deg$^2$. We analyse this dataset in Fourier space, using the power spectrum multipoles to measure Redshift-Space Distortions (RSD) simultaneously with the Alcock-Paczynski (AP) effect and the Baryon Acoustic Oscillation (BAO) scale. We include the power spectrum monopole, quadrupole and hexadecapole in our analysis and compare our measurements with a perturbation theory based model, while properly accounting for the survey window function. To evaluate the reliability of our analysis pipeline we participate in a mock challenge, which resulted in systematic uncertainties significantly smaller than the statistical uncertainties. While the high-redshift constraint on $fσ_8$ at $z_{\rm eff}=0.61$ indicates a small ($\sim 1.4σ$) deviation from the prediction of the Planck $Λ$CDM model, the low-redshift constraint is in good agreement with Planck $Λ$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.