Assoc. Prof. Dr. Emiliano Sefusatti (INAF): Cosmology, galaxy clustering and the Euclid mission (Ponedeljkov kolokvij)

(predavanje v sklopu Ponedeljkovega fizikalnega kolokvija)

Cosmology, galaxy clustering and the Euclid mission Assoc. Prof. Dr. Emiliano Sefusatti (INAF)

Density perturbations in the galaxy distribution are a powerful probe of the cosmological model. Most (but not all!) the information on their statistical properties is encoded in the galaxy 2-point correlation function, or its Fourier-space counterpart, the galaxy power spectrum. I will provide an introduction to the state-of-the-art analytical modelling of the galaxy power spectrum and how its measurements can provide both geometrical and dynamical test of the accelerated expansion and the unknown (dark) energy that, perhaps, drives it. I will mention how it can provide an upper bound to neutrino masses and how an more complete analysis beyond 2-point statistics can hopefully shed light on the physics of inflation. Finally, I will show how the Euclid mission is planning to do all that, and more.