Dark Energy and Matter Evolution from Lensing Tomography

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dc.creatorHu, Wayne
dc.date2002-08-05
dc.date2002-11-27
dc.date.accessioned2026-07-07T10:31:21Z
dc.date.available2026-07-07T10:31:21Z
dc.descriptionReconstructed from lensing tomography, the evolution of the dark matter density field in the well-understood linear regime can provide model-independent constraints on the growth function of structure and the evolution of the dark energy density. We examine this potential in the context that high-redshift cosmology has in the future been fixed by CMB measurements. We construct sharp tests for the existence of multiple dark matter components or a dark energy component that is not a cosmological constant. These functional constraints can be transformed into physically motivated model parameters. From the growth function, the fraction of the dark matter in a smooth component, such as a light neutrino, may be constrained to a statistical precision of sigma(f)= 0.0006 fsky^{-1/2} by a survey covering a fraction of sky fsky with redshift resolution dz=0.1. For the dark energy, a parameterization in terms of the present energy density Omega_{DE}, equation of state w and its redshift derivative w', the constraints correspond to sigma(w)=0.016 fsky^{-1/2} and a degenerate combination of the other two parameters. For a fixed Omega_{DE}, sigma(w') = 0.046 fsky^{-1/2}; for Omega_{DE} marginalized, sigma(w') = 0.069 fsky^{-1/2}.
dc.descriptionerrata version: coding bug in Omega_{DE} variation fixed, leading to stronger Fisher conclusions on dark energy constraints
dc.identifierhttps://arxiv.org/abs/astro-ph/0208093
dc.identifierhttp://arxiv.org/abs/astro-ph/0208093
dc.identifierPhys.Rev.D66:083515,2002
dc.identifierdoi:10.1103/PhysRevD.66.083515
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/178382
dc.subjectAstrophysics
dc.titleDark Energy and Matter Evolution from Lensing Tomography
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