Observatoire de Paris Institut national de recherche scientifique français Univerité Pierre et Marie Curie Université Paris Diderot - Paris 7

Possible Challenges to the Standard Model of Cosmology

lundi 15 avril 2019, par Behnam Javanmardi (LESIA)

Jeudi 18 avril 2019 à 16h00 , Lieu : Salle de conférence du bâtiment 17

The Lambda-Cold-Dark-Matter (ΛCDM) model has been understood to be successful in explaining many cosmological observations, therefore widely accepted as the standard model of cosmology. Nevertheless, it is faced with some interesting challenges with yet no solutions. In my talk, after giving a brief and simple review of the current status of ΛCDM, I will present some of the challenges to this model and my research related to them. In particular, I will talk about an unexpected observed correlation between bulge mass of disk galaxies and the number of their dwarf satellites, and also the significant tension between local and cosmic measurements of the current expansion rate of the Universe.

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