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Exotic singularities in cosmology and varying constants

Mariusz Dabrowski
Institute of Physics, University of Szczecin

I will present a variety of exotic (non-big-bang) singularities such as sudden future singularities, finite scale factor singularities, big-separation, and w-singularities (or type II-V). I will show that they are of a weak type and do not necessarily exhibit geodesic incompletness and may fit observational data (supernovae, baryon acoustic oscillations, CMB, redshift drift). I will also review how these singularities can be weakened, strengthened, or avoided due to the time-variation of the physical constants such as the speed of light c and the gravitational constant G.

2014 February 04, 13:30

Centro de AstrofÝsica da Universidade do Porto (Auditorium)
Rua das Estrelas, 4150-762 Porto

Instituto de Astrof├şsica e Ci├¬ncias do Espa├žo Universidade do Porto Faculdade de Ciências da Universidade de Lisboa Funda├ž├úo para a Ci├¬ncia e a Tecnologia
Outreach at IA