Reconstructing dark energy

Sahni, Varun ; Starobinsky, Alexi (2006) Reconstructing dark energy International Journal of Modern Physics D, 15 (12). pp. 2105-2132. ISSN 0218-2718

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Official URL: http://www.worldscinet.com/ijmpd/15/1512/S02182718...

Related URL: http://dx.doi.org/10.1142/S0218271806009704

Abstract

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.

Item Type:Article
Source:Copyright of this article belongs to World Scientific Publishing Company.
Keywords:Dark Energy; Cosmic Acceleration; Cosmological Reconstruction; Cosmological Constant; Vacuum Energy
ID Code:47350
Deposited On:11 Jul 2011 05:42
Last Modified:11 Jul 2011 05:42

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