Observational constraints on the normal branch of a warped DGP cosmology
作者： Tahereh Azizi , M. Sadegh Movahed , Kourosh Nozari
DOI: 10.1016/J.NEWAST.2011.11.005
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摘要: Abstract We investigate observational constraints on the normal branch of warped DGP braneworld cosmology by using data from Type Ia Supernovae (SNIa), baryon acoustic oscillations (BAO), cosmic microwave background (CMB) and gas mass fraction cluster galaxies. The best fit values model free parameters are: Ω m = 0.240 - 0.130 + 0.050 r c 0.000 0.014 at 1σ confidence interval gold sample SNIa + CMB shift parameter + BAO + gas baryons in results for essence SNIa combined with CMB parameter, BAO correspond to: 0.220 0.170 0.020 0.025 68.3% interval. determine age universe these values. also study effective cosmological dynamics brane via an equation state parameter deceleration to conclude that phantom-like behavior arises this scenario.
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