Pauline E. Vielzeuf
CAUP

Resumo
The standard model of cosmology, so-called ΛCDM remains so far the simplest viable model to describe our universe at large scales. Although it agrees quite well with recent observations, the source of the late cosmic expansion, the Dark energy, parametrized in this model as a cosmological constant $Lambda$ remains unexplained. Hence, alternative parametrizations of this Dark component appeared, and the goal of future surveys will then be to distinguish one model from another. In this talk I will introduce a set of relevent models that have been proposed in the litterature and present observationnal properties that one can forecast in order to verify later on whether or not one will manage to constrain this models with future surveys such as the E-ELT or Euclid. Specific attention will be given to possible variations of the fine-struture constant in these models.

31 maio 2013, 13:30

Centro de Astrofísica
Rua das Estrelas
4150-762 Porto