Reconstructing dark energy

被引:652
作者
Sahni, Varun [1 ]
Starobinsky, Alexei
机构
[1] Interuniv Ctr Astron & Astrophys, Post Bag 4, Pune 411007, Maharashtra, India
[2] LD Landau Theoret Phys Inst, Moscow 119334, Russia
来源
INTERNATIONAL JOURNAL OF MODERN PHYSICS D | 2006年 / 15卷 / 12期
基金
俄罗斯基础研究基金会;
关键词
dark energy; cosmic acceleration; cosmological reconstruction; cosmological constant; vacuum energy;
D O I
10.1142/S0218271806009704
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
This review summarizes recent attempts to reconstruct the expansion history of the universe and to probe the nature of dark energy. Reconstruction methods can be broadly classified into parametric and non-parametric approaches. It is encouraging that, even with the limited observational data currently available, different approaches give consistent results for the reconstruction of the Hubble parameter H(z) and the effective equation of state w(z) of dark energy. Model independent reconstruction using current data allows for modest evolution of dark energy density with redshift. However, a cosmological constant (= dark energy with a constant energy density) remains an excellent fit to the data. Some pitfalls to be guarded against during cosmological reconstruction are summarized and future directions for the model independent reconstruction of dark energy are explored.
引用
收藏
页码:2105 / 2132
页数:28
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