Tuesday, March 16, 2010, 2:00 pm — Small Seminar Room, Bldg. 510
The accelerated expansion of the universe at the present time may be caused by a different law of gravity from General Relativity on cosmological scales instead of by a missing dark energy component. A leading example is the Dvali-Gabadadze-Porrati (DGP) braneworld model where cosmic acceleration arises from gravitational leakage into an extra dimension. I will show the results of a Markov Chain Monte Carlo study of this model given the current observations of the cosmic microwave background anisotropies, supernovae and Hubble constant from the HST key project, and discuss how it is compared to the successful Lambda-CDM model that is based on General Relativity but with a cosmological constant.
Hosted by: Anze Slosar
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