%0 Journal Article
%T Robust neutrino constraints by combining low redshift observations with the CMB
%A Reid, B. A.
%A Verde, L.
%A Jimenez, R.
%A Mena, O.
%J Journal of Cosmology and Astroparticle Physics
%D 2010
%V 01
%N 1
%I Iop Publishing Ltd
%@ 1475-7516
%G English
%F Reid_etal2010
%O ISI:000273314600008
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=511), last updated on Tue, 22 Mar 2011 14:11:56 +0000
%X We illustrate how recently improved low-redshift cosmological measurements can tighten constraints on neutrino properties. In particular we examine the impact of the assumed cosmological model on the constraints. We first consider the new HST H-0 = 74.2 +/- 3.6 measurement by Riess et al. (2009) and the sigma(8)(Omega(m)/0.25)(0.41) = 0.832 +/- 0.033 constraint from Rozo et al. (2009) derived from the SDSS maxBCG Cluster Catalog. In a ACDM model and when combined with WMAP5 constraints, these low-redshift measurements constrain Sigma m(v) < 0.4 eV at the 95% confidence level. This bound does not relax when allowing for the running of the spectral index or for primordial tensor perturbations. When adding also Supernovae and BAO constraints, we obtain a 95% upper limit of Sigma m(v) < 0.3eV. We test the sensitivity of the neutrino mass constraint to the assumed expansion history by both allowing a dark energy equation of state parameter w not equal -1 and by studying a model with coupling between dark energy and dark matter, which allows for variation in w, Omega(k), and dark coupling strength xi. When combining CMB, H-0 and the SDSS LRG halo power spectrum from Reid et al. 2009, we find that in this very general model, Sigma m(v) < 0.51 eV with 95% confidence. If we allow the number of relativistic species N-rel to vary in a ACDM model with Sigma m(v) = 0, we find N-rel = 3.76(-0.68)(+0.63)(+1.38 -1.21) for the 68% and 95% confidence intervals. We also report prior-independent constraints, which are in excellent agreement with the Bayesian constraints.
%K cluster counts
%K cosmological parameters from LSS
%K neutrino masses from cosmology
%K cosmological parameters from CMBR
%R 10.1088/1475-7516/2010/01/003
%U http://arxiv.org/abs/arXiv:0910.0008
%U https://doi.org/10.1088/1475-7516/2010/01/003
%P 003-21pp