The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey : cosmological implications of the Fourier space wedges of the final sample
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We extract cosmological information from the anisotropic power-spectrum measurements from the recently completed Baryon Oscillation Spectroscopic Survey (BOSS), extending the concept of clustering wedges to Fourier space. Making use of new fast-Fourier-transform-based estimators, we measure the power-spectrum clustering wedges of the BOSS sample by filtering out the information of Legendre multipoles ℓ > 4. Our modelling of these measurements is based on novel approaches to describe non-linear evolution, bias and redshift-space distortions, which we test using synthetic catalogues based on large-volume N-body simulations. We are able to include smaller scales than in previous analyses, resulting in tighter cosmological constraints. Using three overlapping redshift bins, we measure the angular-diameter distance, the Hubble parameter and the cosmic growth rate, and explore the cosmological implications of our full-shape clustering measurements in combination with cosmic microwave background and Type Ia supernova data. Assuming a Λ cold dark matter (ΛCDM) cosmology, we constrain the matter density to ΩM=0.311+0.009/−0.010 and the Hubble parameter to H0=67.6+0.7/−0.6kms−1 Mpc−1, at a confidence level of 68 per cent. We also allow for non-standard dark energy models and modifications of the growth rate, finding good agreement with the ΛCDM paradigm. For example, we constrain the equation-of-state parameter to w=−1.019+0.048/−0.039. This paper is part of a set that analyses the final galaxy-clustering data set from BOSS. The measurements and likelihoods presented here are combined with others in Alam et al. to produce the final cosmological constraints from BOSS.
Grieb , J N , Sánchez , A G , Salazar-Albornoz , S , Scoccimarro , R , Crocce , M , Dalla Vecchia , C , Montesano , F , Gil-Marín , H , Ross , A J , Beutler , F , Rodríguez-Torres , S , Chuang , C-H , Prada , F , Kitaura , F-S , Cuesta , A J , Eisenstein , D J , Percival , W J , Vargas-Magaña , M , Tinker , J L , Tojeiro , R , Brownstein , J R , Maraston , C , Nichol , R C , Olmstead , M D , Samushia , L , Seo , H-J , Streblyanska , A & Zhao , G 2017 , ' The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey : cosmological implications of the Fourier space wedges of the final sample ' , Monthly Notices of the Royal Astronomical Society , vol. 467 , no. 2 , pp. 2085-2112 . https://doi.org/10.1093/mnras/stw3384
Monthly Notices of the Royal Astronomical Society
© 2017, the Author(s). This work has been made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at academic.oup.com / https://doi.org/10.1093/mnras/stw3384
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