In the 5-year WMAP data analysis , a new parametrization form for dark energy equation-of-state was used , and it has been shown that the equation-of-state , w ( z ) , crosses the cosmological-constant boundary w = -1 .
Based on this observation , in this paper , we investigate the reconstruction of quintom dark energy model .
As a single-real-scalar-field model of dark energy , the generalized ghost condensate model provides us with a successful mechanism for realizing the quintom-like behavior .
Therefore , we reconstruct this scalar-field quintom dark energy model from the WMAP 5-year observational results .
As a comparison , we also discuss the quintom reconstruction based on other specific dark energy ansatzs , such as the CPL parametrization and the holographic dark energy scenarios .