Observations favor the crossing of phantom divide lines

发布时间：2018-11-05 12:15

【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.
[Abstract]: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, 惟 m0, given prior. We find that, when 惟 m 0 is not small, for example, 惟 m 0 = 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 惟 m 0 given prior.
【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)
【分类号】：P145.9
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本文编号：2312054