Search results for "Supernoves"

showing 1 items of 1 documents

Robust Neutrino Constraints by Combining Low Redshift Observations with the CMB

2009

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…

AstrofísicaAstrophysics and AstronomyCosmology and Nongalactic Astrophysics (astro-ph.CO)Cosmic microwave backgroundDark matterFOS: Physical sciencesAstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesHigh Energy Physics - Phenomenology (hep-ph)0103 physical sciencesNeutrinsNeutrinos010303 astronomy & astrophysicsAstrophysics::Galaxy AstrophysicsPhysicsSpectral indexCosmologia010308 nuclear & particles physicsEquation of state (cosmology)SupernovesAstronomy and AstrophysicsCoupling (probability)RedshiftCosmologyHigh Energy Physics - PhenomenologySupernovaeDark energyHigh Energy Physics::ExperimentNeutrinoAstrophysics - Cosmology and Nongalactic Astrophysics
researchProduct