Résumé / Abstract Seminaire_GReCO

"Backreaction as an alternative to dark energy and modified gravity"

S. Räsänen
Dept. Physique Théorique, Univ. Genève (Genève, Suisse)

When the backreaction of inhomogeneities on the expansion of the universe is taken into account, it may be possible to explain late-time observations without dark energy or modified gravity. I will explain the physics involved, and will discuss a semi-realistic model where the observed timescale of about 10 billion years emerges from the physics of structure formation. I will also discuss the relation between the average expansion rate and light propagation.

lundi 12 janvier 2009 - 11:00
Salle des séminaires Évry Schatzman,
Institut d'Astrophysique de Paris

Page web du séminaire / Seminar's webpage