Séminaire / Seminar GReCO |
| « Backreaction as an alternative to dark energy and modified gravity » |
|
S. Räsänen |
| 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 |
| Pages web du séminaire / Seminar's webpage |