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.
Reading the bibliography…