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Tensions in cosmological data: impact of non standard models and systematic effects

Matteo Martinelli

In recent years, measurements of cosmological parameters coming from different observables have shown tensions between each other, the most striking the approximately 4.5 sigma tension on the Hubble constant between CMB and local measurements. In this talk I will briefly review the status of these tensions and some attempts to solve them modifying the late time evolution of the Universe. I will focus on a specific model, where Vacuum energy and Dark Matter interact with each other, and I will investigate the possibility that unaccounted systematic effects in Supernovae observations might help to reduce these tensions.

2019 November 26, 15:30

Faculdade de Ciências da Universidade de Lisboa (C8.1.67)
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