Dynamical dark energy in light of cosmic distance measurements II: a study using current observations

Abstract

We extract key information of dark energy from current observations of BAO, OHD and $H_0$, and find hints of dynamical behaviour of dark energy. In particular, a dynamical dark energy model whose equation of state crosses $-1$ is favoured by observations. We also find that the Universe has started accelerating at a lower redshift than expected.

arXiv comment10 pages, 4 figures; version accepted to RAA

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