Résumé / Abstract Seminaire_GReCO

"Virialisation-induced negative curvature as a physical explanation for dark energy"

Boud Roukema
Univ. Nicolaus Copernicus (Torun, Pologne)

By definition, the standard, homogeneous models of the Universe are likely to fail when the Universe is inhomogeneous. The virialisation fraction measures inhomogeneity. Its redshift evolution roughly matches the evolution of would-be "dark energy", if the "dark energy" is inferred from the observations by assuming a homogeneous model. This suggests that "dark energy" is a misinterpretation of the fact that we live in the inhomogeneous epoch of the Universe. A virialisation-induced approximation based on the scalar-averaging approach to defining cosmological parameters will be presented as a physically motivated, dark-energy-free approach to modelling extragalactic observations.

lundi 13 janvier 2014 - 11:00
Salle des séminaires Évry Schatzman,
Institut d'Astrophysique de Paris

Page web du séminaire / Seminar's webpage