Reconstructing generalized ghost condensate model with dynamical dark energy parametrizations and observational datasets

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dc.creatorZhang, Jingfei
dc.creatorZhang, Xin
dc.creatorLiu, Hongya
dc.date2006-12-21
dc.date2007-03-21
dc.date.accessioned2026-07-07T11:20:53Z
dc.date.available2026-07-07T11:20:53Z
dc.descriptionObservations of high-redshift supernovae indicate that the universe is accelerating at the present stage, and we refer to the cause for this cosmic acceleration as ``dark energy''. In particular, the analysis of current data of type Ia supernovae (SNIa), cosmic large-scale structure (LSS), and the cosmic microwave background (CMB) anisotropy implies that, with some possibility, the equation-of-state parameter of dark energy may cross the cosmological-constant boundary ($w=-1$) during the recent evolution stage. The model of ``quintom'' has been proposed to describe this $w=-1$ crossing behavior for dark energy. 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. In this paper, we reconstruct the generalized ghost condensate model in the light of three forms of parametrization for dynamical dark energy, with the best-fit results of up-to-date observational data.
dc.description8 pages, 3 figures; references added; accepted for publication in Mod. Phys. Lett. A
dc.identifierhttps://arxiv.org/abs/astro-ph/0612642
dc.identifierhttp://arxiv.org/abs/astro-ph/0612642
dc.identifierMod.Phys.Lett.A23:139-152,2008
dc.identifierdoi:10.1142/S0217732308023505
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194103
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleReconstructing generalized ghost condensate model with dynamical dark energy parametrizations and observational datasets
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