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The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey : measuring H(z) and DA(z) at z = 0.57 with clustering wedges

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Date
11/10/2013
Author
Kazin, Eyal A.
Sánchez, Ariel G.
Cuesta, Antonio J.
Beutler, Florian
Chuang, Chia-Hsun
Eisenstein, Daniel J.
Manera, Marc
Padmanabhan, Nikhil
Percival, Will J.
Prada, Francisco
Ross, Ashley J.
Seo, Hee-Jong
Tinker, Jeremy
Tojeiro, Rita
Xu, Xiaoying
Brinkmann, J.
Joel, Brownstein
Nichol, Robert C.
Schlegel, David J.
Schneider, Donald P.
Thomas, Daniel
Keywords
Cosmological parameters
Distance scale
Large-scale structure of Universe
QB Astronomy
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Abstract
We analyse the 2D correlation function of the Sloan Digital Sky Survey-III Baryon Oscillation Spectroscopic Survey (BOSS) CMASS sample of massive galaxies of the ninth data release to measure cosmic expansion H and the angular diameter distance DA at a mean redshift of 〈z〉 = 0.57. We apply, for the first time, a new correlation function technique called clustering wedges ξΔμ(s). Using a physically motivated model, the anisotropic baryonic acoustic feature in the galaxy sample is detected at a significance level of 4.7σ compared to a featureless model. The baryonic acoustic feature is used to obtain model-independent constraints cz/H/rs = 12.28 ± 0.82 (6.7 percent accuracy) and DA/rs =  9.05 ± 0.27 (3.0 per cent) with a correlation coefficient of −0.5, where rs is the sound horizon scale at the end of the baryonic drag era. We conduct thorough tests on the data and 600 simulated realizations, finding robustness of the results regardless of the details of the analysis method. Combining this with rs constraints from the cosmic microwave background, we obtain H(0.57) = 90.8 ± 6.2 km s−1 Mpc−1 and DA(0.57) = 1386 ± 45  Mpc. We use simulations to forecast results of the final BOSS CMASS data set. We apply the reconstruction technique on the simulations demonstrating that the sharpening of the anisotropic baryonic acoustic feature should improve the detection as well as tighten constraints of H and DA by ∼30 per cent on average.
Citation
Kazin , E A , Sánchez , A G , Cuesta , A J , Beutler , F , Chuang , C-H , Eisenstein , D J , Manera , M , Padmanabhan , N , Percival , W J , Prada , F , Ross , A J , Seo , H-J , Tinker , J , Tojeiro , R , Xu , X , Brinkmann , J , Joel , B , Nichol , R C , Schlegel , D J , Schneider , D P & Thomas , D 2013 , ' The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey : measuring H(z) and DA(z) at z = 0.57 with clustering wedges ' , Monthly Notices of the Royal Astronomical Society , vol. 435 , no. 1 , pp. 64-86 . https://doi.org/10.1093/mnras/stt1261
Publication
Monthly Notices of the Royal Astronomical Society
Status
Peer reviewed
DOI
https://doi.org/10.1093/mnras/stt1261
ISSN
0035-8711
Type
Journal article
Rights
Copyright © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at: https://doi.org/10.1093/mnras/stt1261
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  • Physics & Astronomy Research
  • University of St Andrews Research
URL
http://adsabs.harvard.edu/abs/2013MNRAS.435...64K
URI
http://hdl.handle.net/10023/16265

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