Constraints on holographic dark energy from Type Ia supernova observations

In this paper, we use the Type Ia supernovae data to constrain the holographic dark energy model proposed by Li. We also apply a cosmic age test to this analysis. We consider in this paper a spatially flat FRW universe with matter component and holographic dark energy component. The fit result shows that the case c < 1 is favored, which implies that the holographic dark energy behaves as a quintom type dark energy. Furthermore, an expected SNAP simulation using ΛCDM as a fiducial model is performed on this model, and the result shows that the holographic dark energy model takes on c < 1 even though the dark energy is indeed a cosmological constant.