Search results for "Cúmuls de galàxies"

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Cosmological parameters degeneracies and non-Gaussian halo bias

2010

We study the impact of the cosmological parameters uncertainties on the measurements of primordial non-Gaussianity through the large-scale non-Gaussian halo bias effect. While this is not expected to be an issue for the standard Lambda CDM model, it may not be the case for more general models that modify the large-scale shape of the power spectrum. We consider the so-called local non-Gaussianity model, parametrized by the f(NL) non-Gaussianity parameter which is zero for a Gaussian case, and make forecasts on f(NL) from planned surveys, alone and combined with a Planck CMB prior. In particular, we consider EUCLID- and LSST-like surveys and forecast the correlations among f(NL) and the runni…

AstrofísicaCúmuls de galàxiesParticle physicsCosmology and Nongalactic Astrophysics (astro-ph.CO)Cosmic microwave backgroundFOS: Physical sciencesGalaxy clustersAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics01 natural sciencesPower spectrumsymbols.namesake0103 physical sciencesPlanck010303 astronomy & astrophysicsRedshift surveysPhysicsSpectral indexCosmological parameters from LSSCosmologiaClusters of galaxies010308 nuclear & particles physicsEquation of state (cosmology)Order (ring theory)Spectral densityAstronomy and AstrophysicsCosmologyHubble volumeDark energysymbolsAstrophysics - Cosmology and Nongalactic AstrophysicsJournal of Cosmology and Astroparticle Physics
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