Résumé / Abstract Seminaire_GReCO

"The Apparent Universe"

A. Helou
Laboratoire AstroParticule et Comologie, Université Paris Diderot (Paris, France)

The usual depiction of black hole physics is based on the static Schwarzschild metric and teleological event horizon. There is an analogy with cosmological models, i.e the static de Sitter metric and its event horizon. However, since our real Universe is highly dynamical, the analogy remains veiled when one works with the static black hole. Using a dynamical description of black hole horizon, we find a striking parallel with our cosmological horizon. Such a dynamical formalism has been proposed by Hayward for black holes: it singles out the trapping horizon, or apparent horizon, as the relevant object to work with.

lundi 12 janvier 2015 - 11:00
Salle des séminaires Évry Schatzman,
Institut d'Astrophysique de Paris

Page web du séminaire / Seminar's webpage