Comparison between different cosmological models

Details Comparison between different cosmological models Comparison between different cosmological models

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008phrvd..77j7303p&link_type=abstract

Physical Review D, vol. 77, Issue 10, id. 107303

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10

Higher-Dimensional Gravity And Other Theories Of Gravity, Dark Energy, Observational Cosmology

Scientific paper

Several cosmological models have been proposed in order to explain the current acceleration of the Universe. Recently, the normal branch of the DGP (after Dvali, Gabadadze, and Porrati) brane model with a generalized Chaplygin gas was studied as a model which can cross the phantom divide line avoiding the future singularity. In the present work, we wish to address the question of whether or not the aforementioned model has a better fit to supernovae data compared to cold dark matter with a cosmological constant, the (generalized) Chaplygin gas, and the DGP model with the self-accelerating branch without extra fluid for dark energy. We have found that the Chaplygin-DGP model has the worst fit, while the two-fluid model with Chaplygin gas and dust (baryons) has the best fit among the theoretical cosmological models considered here.

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