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Title: The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: galaxy clustering measurements in the low-redshift sample of Data Release 11
Author: Tojeiro, Rita
Ross, Ashley J.
Burden, Angela
Samushia, Lado
Manera, Marc
Percival, W.J.
Beutler, Florian
Cuesta, Antonio J.
Dawson, Kyle S.
Eisenstein, Daniel J.
Ho, Shirley
Howlett, Cullan
McBride, Cameron K.
Montesano, Francesco
Parejko, John
Reid, Beth
Sanchez, Ariel G.
Schlegel, D.J.
Schneider, D.P.
Tinker, J. L.
Vargas Magana, Mariana
White, M.
Keywords: Cosmologia
Observacions astronòmiques
Astronomical observations
Issue Date: 4-Apr-2014
Publisher: Royal Astronomical Society
Abstract: We present the distance measurement to z = 0.32 using the eleventh data release (DR) of the Sloan Digital Sky Survey-III Baryon Acoustic Oscillation Survey (BOSS). We use 313 780 galaxies of the low-redshift (LOWZ) sample over 7341 square degrees to compute D_V=(1264 ± 25) (r_d/r_{d,fid}) - a sub 2 per cent measurement - using the baryon acoustic feature measured in the galaxy two-point correlation function and power spectrum. We compare our results to those obtained in DR10. We study observational systematics in the LOWZ sample and quantify potential effects due to photometric offsets between the northern and southern Galactic caps. We find the sample to be robust to all systematic effects found to impact on the targeting of higher redshift BOSS galaxies and that the observed north-south tensions can be explained by either limitations in photometric calibration or by sample variance, and have no impact on our final result. Our measurement, combined with the baryonic acoustic scale at z = 0.57, is used in Anderson et al. to constrain cosmological parameters.
Note: Reproducció del document publicat a:
It is part of: Monthly Notices of the Royal Astronomical Society, 2014, vol. 440, num. 3, p. 2222-2237
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ISSN: 0035-8711
Appears in Collections:Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

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