2007

Measuring the dark side (with weak lensing)

Amendola, Luca, Kunz, Martin, Sapone, Domenico

Understand

We introduce a convenient parametrization 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.
  • We find that a large-scale weak-lensing tomographic survey is able to easily distinguish the Dvali-Gabadadze-Porrati model from LCDM and to determine the perturbation growth index to an absolute error of 0.02-0.03.

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