Reconstruction of Hessence Dark Energy and the Latest Type Ia Supernovae Gold Dataset

Details Reconstruction of Hessence Dark Energy and the Latest Type Ia Supernovae Gold Dataset Reconstruction of Hessence Dark Energy and the Latest Type Ia Supernovae Gold Dataset

2006-12-28

arxiv.org/abs/astro-ph/0612746v3

Phys.Rev.D75:043009,2007

Astronomy and Astrophysics

Astrophysics

14 pages, 6 figures, revtex4; v2: references added; v3: published version

Scientific paper

10.1103/PhysRevD.75.043009

Recently, many efforts have been made to build dark energy models whose equation-of-state parameter can cross the so-called phantom divide $w_{de}=-1$. One of them is the so-called hessence dark energy model in which the role of dark energy is played by a non-canonical complex scalar field. In this work, we develop a simple method based on Hubble parameter $H(z)$ to reconstruct the hessence dark energy. As examples, we use two familiar parameterizations for $H(z)$ and fit them to the latest 182 type Ia supernovae Gold dataset. In the reconstruction, measurement errors are fully considered.

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