Abstract
We analyse the dark energy problem using observational H(z) data plus the curvature constraint given by WMAP. After a non-parametric statistical study covering the most probable range of Ω m0 and H 0 from different combination of data, we investigate the possibility of having the dark energy EoS parameter ω x ≠−1. In order to keep strict flatness (1% of deviation from Ω=1), our results point out this is the case for 0.20≲Ω m0≲0.23 and H 0≈67 km/s/Mpc, with ω x ≈−0.55. However, if we admit a 10% deviation from the flatness condition, ω x may have any value in the range [−1.2,−0.5] for 0.20≲Ω m0≲0.35 and 67≲H 0≲74 km/s/Mpc.
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Ribeiro, A.L.B., Schilling, A.C. Dark energy and flatness from observational H(z)+WMAP constraint. Astrophys Space Sci 321, 43–46 (2009). https://doi.org/10.1007/s10509-009-9995-8
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DOI: https://doi.org/10.1007/s10509-009-9995-8