摘要
Using three different parameterized dark energy models, we reconstruct the properties of dark energy from the latest 397 Sne Ia, CMB and BAO with the present matter density, Ωm0, given prior. We find that, when Ωm0 is not small, for example, Ωm0 = 0.28 or 0.32, an evolving dark energy with a crossing of phantom divide line is favored and this conclusion seems to be model independent. We also find that the evolving properties of dark energy become more and more evident with the increase of Ωm0 given prior.
Using three different parameterized dark energy models, we reconstruct the properties of dark energy from the latest 397 Sne Ia, CMB and BAO with the present matter density, Ωm0, given prior. We find that, when Ωm0 is not small, for example, Ωm0 = 0.28 or 0.32, an evolving dark energy with a crossing of phantom divide line is favored and this conclusion seems to be model independent. We also find that the evolving properties of dark energy become more and more evident with the increase of Ωm0 given prior.
作者
HUANG TieTie1,2,3, WU PuXun2,3 & YU HongWei2,3 1Department of Physics, Xiangnan College, Chenzhou 423000, China
2Department of Physics and Institute of Physics, Hunan Normal University, Changsha 410081, China
3Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education, Hunan Normal University, Changsha 410081, China
基金
supported in part by the National Natural Science Foundation of China (Grants Nos. 10775050, 10705055, and 10935013)
the SRFDP(Grant No. 20070542002),the Program for the Key Discipline in Hunan Province
the FANEDD (Grant No 200922)
