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8 mars 2019 Tout le mois

Martin Crocce (IEEC-CSIC) - Accelerated Cosmic Expansion and the Dark Energy Survey

Vendredi 8 mars 11:00-12:00

The striking discovery that the Cosmic expansion is not slowing down but accelerating has turned into one of the puzzles in Cosmology sparking large observational campaigns to map the Large Scale Structure and geometry of the Universe across cosmic time. I will briefly review this effort and then discuss The Dark Energy Survey (DES), a state-of-the-art large-scale galaxy survey designed to understand such acceleration by mapping 5000 deg2 measuring the positions and shapes for 300 million galaxies up to redshift 1, the light-curves of several thousand supernovae, and the masses of tens of thousands of galaxy clusters. I will present the latest cosmological results from the first year of observations, in particular those related to the combination of large-scale structure and weak gravitational lensing, how they compare with those from other datasets, and what to expect in the near future.

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