2007/08/02 by Xing Wu, Desheng Wu, Yi Zhang +9 · 3 citations
Earth and Planetary Sciences · Physics and Astronomy · #Astrophysics (astro-ph) #Cosmology and Gravitation Theories #FOS: Physical sciences #Geophysics and Gravity Measurements #Solar and Space Plasma Dynamics #astro-ph
paper · pdf · doi:10.48550/arxiv.0708.0349
Revtex, 10 pages with 11 figures. Discussions and minor corrections added
openalex publication_date 2007/08/02 · arxiv created 2007/10/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this paper, we use the Type Ia supernova data as well as the CMB and LSS data to constrain the agegraphic dark energy model recently proposed by Cai. Due to its peculiar nature, the parameter n of this model cannot be well constrained by the SNIa data, while the other parameter Ωm0 can be constrained to be 0.34±0.04. When combined with CMB and LSS data, the range of 1σ confidence level for n is greatly narrowed, albeit still very large. The best fit result is Ωm0=0.28±0.02, which is consistent with most observations like WMAP and SDSS, and n=3.4, of which a meaningful range of confidence level can not be obtained due to the fact that the contours are not closed. Despite of this result, we conclude that for n>1 this model is consistent with SNIa, CMB and LSS observations. Furthermore, the fitting results indicate a generalized definition for the agegraphic dark energy.