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The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: weighing the neutrino mass using the galaxy power spectrum of the CMASS sample

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Author(s)

Gong-Bo Zhao, Shun Saito, Will J. Percival, Ashley J. Ross, Francesco Montesano, Matteo Viel, Donald P. Schneider, Marc Manera, Jordi Miralda-Escudé, Nathalie Palanque-Delabrouille, Nicholas P. Ross, Lado Samushia, Ariel G. Sánchez, Molly E. C. Swanson, Daniel Thomas, Rita Tojeiro, Christophe Yèche, Donald G. York

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Abstract

We measure the sum of the neutrino particle masses using the three-dimensional galaxy power spectrum of the Sloan Digital Sky Survey III (SDSS-III) Baryon Oscillation Spectroscopic Survey Data Release 9the constant MASS (CMASS) galaxy sample. Combined with the cosmic microwave background, supernova and additional baryonic acoustic oscillation data, we find upper 95 per cent confidence limits (CL) of the neutrino mass Σmν <0.340 eV within a flatΛ cold dark matter (ΛCDM) background, and Σmν <0.821 eV, assuming a more general background cosmological model. The number of neutrino species is measured to be Neff = 4.308 ± 0.794 and4.032^{+0.870}_{-0.894} for these two cases, respectively. We study and quantify the effect of several factors on the neutrino measurements, including the galaxy power spectrum bias model, the effect of redshift-space distortion, the cut-off scale of the power spectrum and the choice of additional data. The impact of neutrinos with unknown masses on other cosmological parameter measurements is investigated. The fractional matter density and the Hubble parameter are measured to be ΩM = 0.2796 ± 0.0097, H0 = 69.72^{+0.90}_{-0.91} kms-1 Mpc-1 (flat ΛCDM) and ΩM =0.2798^{+0.0132}_{-0.0136}, H_0=73.78^{+3.16}_{-3.17} kms-1 Mpc-1 (more general background model). Based on a Chevallier-Polarski-Linder parametrization of the equation-of-state w of dark energy, we find that w = -1 is consistent with observations,even allowing for neutrinos. Similarly, the curvature ΩK and the running of the spectral indexαs are both consistent with zero. The tensor-to-scalar ratio is constrained down to r <0.198 (95 per cent CL, flat ΛCDM) and r <0.440 (95 per cent CL, more general background model).
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Original languageEnglish
Pages (from-to)2038-2053
JournalMonthly Notices of the Royal Astronomical Society
Volume436
Issue number3
Early online date12 Oct 2013
DOIs
Publication statusPublished - 11 Dec 2013

    Research areas

  • Cosmological parameters, Large-scale structure of Universe

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