Probing the nature of cosmic acceleration

Abstract

The cosmic acceleration is one of the most significant cosmological discoveries over the last century. The two categories of explanation are exotic component (dark energy) and modified gravity. We constrain the two types of model by a joint analysis with perturbation growth and direct $H(z)$ data. Though the minimal ${\chi }^2$ of the $\Lambda$CDM is almost the same as that of DGP, in the sense of consistency we find that the dark energy ($\Lambda$CDM) model is more favored through a detailed comparison with the corresponding parameters fitted by expansion data.

10 pages, 6 figures, typo corrected

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Cited by in corpus (15)

• The growth of matter perturbations in f(R) models
• A generalized equation of state for dark energy
• Parameterizing the Effect of Dark Energy Perturbations on the Growth of Structures
• The velocity field of 2MRS Ks=11.75 galaxies: constraints on beta and bulk flow from the luminosity function
• Cosmology with clustering anisotropies: disentangling dynamic and geometric distortions in galaxy redshift surveys
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• Crossing the Phantom divide line in the Chaplygin gas model
• Braneworld cosmology in the sourced-Taub background