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Varying Constants and Dark Energy: from HIRES and UVES to ESPRESSO and beyond

Ana C. O. Leite

Understanding what constitutes dark energy is a key problem of modern cosmology. Astrophysical measurements of nature's fundamental constants can be used to study the properties of dark energy, either by themselves or in combination with other cosmological datasets. In recent work we discussed methods based on Principal Component Analysis to constrain the dark energy equation of state using Type Ia supernovae at low redshift and measurements of fundamental couplings at higher redshifts, in the context of ESPRESSO and CODEX. In this talk we will discuss how the results of this theoretical analysis can be applied in practice: how they will be calibrated by applying them to an existing dataset of UVES, and how they can be extrapolated to future spectrographs, in order to define an optimal observational strategy for them.

2013 February 06, 13:30

Centro de Astrofísica da Universidade do Porto (Classroom)
Rua das Estrelas, 4150-762 Porto

Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia