Thursday, September 22, 2011, 16:00
WHGA/001
R. Durrer, Uni. Geneva
Abstract:
After a brief introduction I discuss what we truly know about dark energy.
I shall argue that up to date our indications for the existence of dark energy
all are based on distance measurements and their relation to redshift.
Supernovae, CMB anisotropies and observations of baryon acoustic
oscillations, they all simply tell us that the observed distance to a given
redshift z is larger than the one expected from a Friedmann Lemaitre
universe with matter only and with the locally measured Hubble parameter.