Measuring the dark side (with weak lensing)

We introduce a convenient parameterization of dark energy models that is general enough to include several modified gravity models and generalized forms of dark energy. In particular we take into account the linear perturbation growth factor, the anisotropic stress and the modified Poisson equation....

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Bibliographic Details
Published inJournal of cosmology and astroparticle physics Vol. 2008; no. 4; p. 013
Main Authors Amendola, Luca, Kunz, Martin, Sapone, Domenico
Format Journal Article
LanguageEnglish
Published United States IOP Publishing 10.04.2008
Subjects
ANISOTROPY
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
COSMOLOGICAL MODELS
DISTURBANCES
GRAVITATION
GRAVITATIONAL LENSES
NONLUMINOUS MATTER
POISSON EQUATION
SATELLITES
SENSITIVITY
STANDARD MODEL
STRESSES
TOMOGRAPHY
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Summary:We introduce a convenient parameterization of dark energy models that is general enough to include several modified gravity models and generalized forms of dark energy. In particular we take into account the linear perturbation growth factor, the anisotropic stress and the modified Poisson equation. We discuss the sensitivity of large-scale weak lensing surveys like the proposed DUNE satellite to these parameters (assuming systematic errors can be controlled). We find that a large-scale weak lensing tomographic survey is able to easily distinguish the Dvali-Gabadadze-Porrati model from {Lambda}CDM and to determine the perturbation growth index to an absolute error of 0.02-0.04.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2008/04/013