Estimating the uncorrelated dark energy evolution in the Planck era

被引：13
|
作者：
Wang, F. Y. [1 ,2 ]
Dai, Z. G. [1 ,2 ]
机构：
[1] Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China
[2] Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Jiangsu, Peoples R China
来源：
PHYSICAL REVIEW D | 2014年 / 89卷 / 02期
基金：
中国国家自然科学基金;
关键词：
HUBBLE-SPACE-TELESCOPE; BARYON ACOUSTIC-OSCILLATIONS; GAMMA-RAY BURSTS; EXPANSION HISTORY; UNIVERSE; CONSTRAINTS; PROBE; RECONSTRUCTION; SUPERNOVAE; CONSTANT;
D O I：
10.1103/PhysRevD.89.023004
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The equation of state (EOS), w(z), is the most important parameter of dark energy. We reconstruct the evolution of this EOS in a model-independent way using the latest cosmic microwave background (CMB) data from Planck and other observations, such as type Ia supernovae, the baryonic acoustic oscillation measurements (SDSS, 6dF, BOSS, and WiggleZ), and the Hubble parameter value H(z). The results show that the EOS is consistent with the cosmological constant at the 2 sigma confidence level, not preferring a dynamical dark energy. The uncorrelated EOS of dark energy constraints from Planck CMB data are much tighter than those from the WMAP 9-year CMB data.
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页数：5
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