Journal Article

A comprehensive comparison of cosmological models from the latest observational data

K. Shi, Y. F. Huang and T. Lu

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 426, issue 3, pages 2452-2462
Published in print November 2012 | ISSN: 0035-8711
Published online November 2012 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2012.21784.x
A comprehensive comparison of cosmological models from the latest observational data

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We carry out a detailed investigation of some popular cosmological models in light of the latest observational data, including the Union2.1 supernovae compilation, the baryon acoustic oscillation measurements from the WiggleZ Dark Energy Survey and the cosmic microwave background information from the Wilkinson Microwave Anisotropy Probe seven-year observations, along with the observational Hubble parameter data. Based on the selection statistics of the models, such as the Akaike and the Bayesian information criteria, we compare different models to assess their worth. We do not assume a flat universe in the fitting. Our results show that the concordance Λ cold dark matter (CDM) model remains the best model to explain the data, while the Dvali–Gabadadze–Porrati model is clearly not favoured by the data. Among these models, the models whose parameters can reduce themselves to the ΛCDM model provide good fits to the data. These results indicate that for the current data, there is no obvious evidence to support the use of any more complex models over the simplest ΛCDM model.

Keywords: cosmological parameters; cosmology: observations; cosmology: theory; dark energy

Journal Article.  6946 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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