Résumé / Abstract Seminaire_GReCO

"A non inflationary cosmological paradigm"

P. Peter
Institut d'Astrophysique de Paris (Paris, France)

Inflation is a paradigm that currently lacks challengers in solving the many problems (horizon, flatness, ...) encountered in standard cosmology. And it can even produce perturbations in agreement with data. A scale invariant spectrum is produced during a matter dominated contraction, so it is natural to ask whether such a phase could bounce to the currently expanding epoch, and what would the consequences be. I shall show that such a bouncing paradigm not only solves the usual problems, actually dynamically leading to a homogeneous model, but that it also predicts a spectrum of perturbations which exhibits differences with the inflation predictions (oscillations and tensor to scalar ratio). Forthcoming Planck data might single out one paradigm over the other!

lundi 1er décembre 2008 - 11:00
Salle des séminaires Évry Schatzman,
Institut d'Astrophysique de Paris

Page web du séminaire / Seminar's webpage