Tests for cosmological evolution of a brane Universe model

摘要

The relativistic Friedmann Lemaitre cosmology model (FLCM) is very sucessful in describing the evolution history of the Universe from the "First three Minutes". Any alternative model should be consistent with the FLCM explanations to the later stage evolutions of the Universe at certain points. A noncompact extra dimension model was recently proposed by Randall and Sundrum. Binetruy et at. obtained the modified Friedmann equation, in which the energy density of the brane appears quadratically in contrast with the linear behavior of the standard Friedmann equation. We investigate various kinds of classical cosmological effects of the new models and get a general solution of the cosmic evolution for this extended model, with more detail discussions of the brane tension parameter on these cosmological tests. [References: 20]