Bibcode
Olmstead, Matthew D.; Nichol, Robert C.; Vazquez, Jose A.; Brownstein, Joel R.; Vargas-Magaña, Mariana; Tinker, Jeremy L.; Tojeiro, Rita; Thomas, Daniel; Slosar, Anže; Satpathy, Siddharth; Sánchez, Ariel G.; Samushia, Lado; Salazar-Albornoz, Salvador; Rossi, Graziano; Percival, Will J.; Kitaura, Francisco-Shu; Ho, Shirley; Gil-Marín, Héctor; Grieb, Jan Niklas; Eisenstein, Daniel J.; Beutler, Florian; Alam, Shadab; Prada, Francisco; Rubiño-Martín, J. A.; Cuesta, Antonio J.; Wang, Yuting; Zhao, Gong-bo; Ross, Ashley J.; Rodríguez-Torres, Sergio; Pellejero-Ibanez, Marcos; Chuang, Ch.-H.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society, Volume 471, Issue 2, p.2370-2390
Advertised on:
10
2017
Citations
54
Refereed citations
49
Description
We analyse the broad-range shape of the monopole and quadrupole
correlation functions of the Baryon Oscillation Spectroscopic Survey
Data Release 12 (DR12) CMASS and LOWZ galaxy sample to obtain
constraints on the Hubble expansion rate H(z), the angular-diameter
distance DA(z), the normalized growth rate
f(z)σ8(z) and the physical matter density
Ωm h2. We adopt wide and flat priors on all
model parameters in order to ensure the results are those of a
'single-probe' galaxy clustering analysis. We also marginalize over
three nuisance terms that account for potential observational
systematics affecting the measured monopole. However, such Monte Carlo
Markov Chain analysis is computationally expensive for advanced
theoretical models. We develop a new methodology to speed up the
analysis. Using the range 40 h-1 Mpc < s < 180
h-1 Mpc, we obtain
{DA(z)rs,fid/rs (Mpc),
H(z)rs/rs,fid km s-1 Mpc-1,
f(z)σ8(z), Ωm h2} = {956
± 28, 75.0 ± 4.0, 0.397 ± 0.073, 0.143 ±
0.017} at z = 0.32 and {1421 ± 23, 96.7 ± 2.7, 0.497
± 0.058, 0.137 ± 0.015} at z = 0.59 where rs is
the comoving sound horizon at the drag epoch and rs,fid =
147.66 Mpc for the fiducial cosmology used in this study. Combining our
measurements with Planck data, we obtain Ωm = 0.306
± 0.009, H0 = 67.9 ± 0.7 km s-1
Mpc-1 and σ8 = 0.815 ± 0.009 assuming
Λcold dark matter (CDM); Ωk = 0.000 ±
0.003 and w = -1.02 ± 0.08 assuming owCDM. Our results show no
tension with the flat ΛCDM cosmological paradigm. This paper is
part of a set that analyses the final galaxy clustering data set from
Baryon Oscillation Spectroscopic Survey.
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FRANCISCO SHU
KITAURA JOYANES