Dynamical Dark Energy in Light of Cosmic Distance Measurements. II. A Study Using Current Observations

Abstract

Abstract We extract key information on dark energy from current observations of BAO, OHD and H 0, and find hints of dynamical behavior of dark energy. In particular, a dynamical dark energy model whose equation of state crosses −1 is favored by observations. We also find that the Universe has started accelerating at a lower redshift than expected.