Accelerated expansion from structure formation – Syksy Rasanen
Date: Tue. April 4th, 2006, 11:30 am-12:30 pmLocation: Rockefeller 221
I discuss the backreaction of inhomogeneities on the expansion of the universe. The average behaviour of an inhomogeneous spacetime is not given by the Friedmann-Robertson-Walker equations. The new terms in the exact equations hold the possibility of explaining the observed acceleration without a cosmological constant or new physics. In particular, the coincidence problem may be solved by a connection with structure formation.