http://arxiv.org/abs/1406.2513
The Hubble parameter is commonly regarded as an important parameter in cosmology, which determines the expansion rate of the Universe at present. Since discrepancy has been found between low redshift and high redshift estimation of Hubble constant, we are interested in whether that tension indicates dynamical dark energy. In this article we emphasize that the observed Hubble parameters, along with observed Hubble constant, can help us in probing the evolutional behavior of the mysterious dark energy. We carry out null hypothesis tests through different diagnostic approaches. According to the present observations of Hubble constant, possibility of dynamical dark energy can be captured from null tests with and without observed value of Hubble constant.
J. Wang and X. Meng
Wed, 11 Jun 14
18/68
Comments: 5 pages,5 figures, comments are welcomed
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