WMAP constraints on low redshift evolution of dark energy

Jassal, H. K. ; Bagla, J. S. ; Padmanabhan, T. (2005) WMAP constraints on low redshift evolution of dark energy Monthly Notices of the Royal Astronomical Society: Letters, 356 (1). L11-L16. ISSN 1745-3925

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Official URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1745-...

Related URL: http://dx.doi.org/10.1111/j.1745-3933.2005.08577.x


The conceptual difficulties associated with a cosmological constant have led to the investigation of alternative models in which the equation of state parameter, w=p/ρ, of the dark energy evolves with time. We show that combining the supernova type Ia observations with the constraints from WMAP observations restricts large variation of ρ(z) at low redshifts. The combination of these two observational constraints is stronger than either one. The results are completely consistent with the cosmological constant as the source of dark energy.

Item Type:Article
Source:Copyright of this article belongs to John Wiley and Sons.
Keywords:Cosmic Microwave Background; Cosmological Parameters
ID Code:73551
Deposited On:06 Dec 2011 09:02
Last Modified:06 Dec 2011 09:02

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