2007/07/31 by Yongli Ping, Lixin Xu, Chengwu Zhang +1
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #gr-qc
paper · pdf · doi:10.1142/s0218271807011024
published as Int.J.Mod.Phys.D16:1633-1640,2007 · 8 pages,4 figures
openalex publication_date 2007/10/01 · arxiv created 2007/12/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We discuss the exact solutions of brane universes and the results indicate that the Friedmann equations on the branes are modified with a new density term. Then, we assume the new term as the density of dark energy. Using Wetterich's parametrization equation of state (EOS) of dark energy, we obtain that the new term varies with the redshift z. Finally, the evolutions of the mass density parameter Ω 2 , dark energy density parameter Ω x and deceleration parameter q 2 are studied.