<< back
Is the universe heading towards a violent end?

Diego Sáez Gómez

General Relativity contains inherently singularities, which refer to geodesically incomplete spacetimes, according to the usual definitions by Hawking and Ellis. Over the last years, what is called in the literature by "future cosmological singularities" have drawn much attention within the scientific community, since some dark energy models lead the universe to one of these "singularities". In this talk, I will review and show the physical features of these singularities, and then present several phenomenological parameterizations of the Hubble expansion rate to model different singularities existing in the literature and use SN Ia, BAO and H(z) data to constrain how far in the future the singularity needs to be, and how good the parametrizations are in comparison with the concordance model in cosmology.

2016 June 07, 10:30

Faculdade de Ciências da Universidade de Lisboa (C6.2.51)
Campo Grande, 1749-016 Lisboa

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