Accelerated expansion from structure formation


Rasanen, S. (2006). Accelerated expansion from structure formation. Perimeter Institute. https://pirsa.org/06040011


Rasanen, Syksy. Accelerated expansion from structure formation. Perimeter Institute, Apr. 11, 2006, https://pirsa.org/06040011


          @misc{ pirsa_PIRSA:06040011,
            doi = {10.48660/06040011},
            url = {https://pirsa.org/06040011},
            author = {Rasanen, Syksy},
            keywords = {Cosmology},
            language = {en},
            title = {Accelerated expansion from structure formation},
            publisher = {Perimeter Institute},
            year = {2006},
            month = {apr},
            note = {PIRSA:06040011 see, \url{https://pirsa.org}}


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-Robertseon-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.