Cosmological Constant or Variable Dark Energy?

Details Cosmological Constant or Variable Dark Energy? Cosmological Constant or Variable Dark Energy?

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007chphl..24.2459x&link_type=abstract

Chinese Physics Letters, Volume 24, Issue 8, pp. 2459-2462 (2007).

Physics

4

Scientific paper

Selection statics of the Akaike information criterion (AIC) model and the Bayesian information criterion (BIC) model are applied to the Λ-cold dark matter (ΛCDM) cosmological model, the constant equation of state of dark energy, w = constant, and the parametrized equation of state of dark energy, w(z) = w0+w1z/(1+z), to determine which one is the better cosmological model to describe the evolution of the universe by combing the recent cosmic observational data including Sne Ia, the size of baryonic acoustic oscillation (BAO) peak from SDSS, the three-year WMAP CMB shift parameter. The results show that AIC, BIC and current datasets are not powerful enough to discriminate one model from the others, though odds suggest differences between them.

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