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Dark Energy and Dark Matter as Curvature Effects

February 25, 16:00 Aula Magna

Salvatore Capozziello (Università di Napoli & INFN)

ABSTRACT

Alternative gravity models have recently attracted a lot of in- terest as alternative candidates to explain the observed cosmic acceleration, the flatness of the rotation curves of spiral galax- ies, the gravitational potential of galaxy clusters, and other rel- evant astrophysical phenomena. Very likely, what we call “dark matter” and “dark energy” are nothing else but signals of the breakdown of General Relativity at large scale and could be interpreted as a sort of “curvature effect”. Furthermore, PPN- parameters deduced from Solar System experiments and strong field astrophysical phenomena (compact objects, magnetars and neutron stars) do not exclude the possibility that such theories could give other observable effects. We review these results giv- ing the basic ingredients of such an approach.