Parametrizing the transition to the phantom epoch with Supernovae Ia and Standard Rulers

Abstract

The reconstruction of a (non)canonical scalar field Lagrangian from the dark energy Equation of State (EoS) parameter is studied, where it is shown that any EoS parametrization can be well reconstructed in terms of scalar fields. Several examples of EoS parameters are studied and the particular scalar field Lagrangian is reconstructed. Then, we propose some new parametrizations that may present a (fast) transition to a phantom dark energy EoS (where $w_{DE}<-1$) and the scalar field Lagrangian is also reconstructed numerically. Furthermore, the properties of these parametrizations of the dark energy EoS are studied by using supernovae Ia data (HST Cluster Supernova Survey) combined with Standard Ruler datasets [Cosmic Microwave Background (CMB) and Baryon Acoustic Oscillations (BAO)] and its comparison with the $\Lambda$CDM model is analyzed. Then, the best fit of the models is obtained, which provides some information about whether a phantom transition may be supported by the observations. In this regard, the crossing of the phantom barrier is allowed statistically but the occurrence of a future singularity seems unlikely.

19 pages, 9 figures. Analysis extended, version published in Phys. Rev. D

References in corpus (30)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Dynamics of dark energy
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
• Extended Theories of Gravity and their Cosmological and Astrophysical Applications
• Measuring the Baryon Acoustic Oscillation scale using the SDSS and 2dFGRS
• Dark energy in modified Gauss-Bonnet gravity: late-time acceleration and the hierarchy problem
• Can dark energy evolve to the Phantom?
• Future of the universe in modified gravitational theories: Approaching to the finite-time future singularity
• The future evolution and finite-time singularities in $F(R)$-gravity unifying the inflation and cosmic acceleration
• Dark Energy: the equation of state description versus scalar-tensor or modified gravity
• Reconstructing the universe history, from inflation to acceleration, with phantom and canonical scalar fields
• Quintessence and phantom cosmology with non-minimal derivative coupling
• A f(R) gravity without cosmological constant
• Dark Matter from R^2-gravity
• The evolution of density perturbations in f(R) gravity
• Mapping the Cosmological Expansion
• A cosmic vector for dark energy
• On the way from matter-dominated era to dark energy universe
• Cosmological dynamics of Scalar--Tensor Gravity
• Barotropic index w-singularities in cosmology
• Comparison of Standard Ruler and Standard Candle constraints on Dark Energy Models
• Cosmological evolution in vector-tensor theories of gravity
• 6+1 lessons from f(R) gravity
• Singular fate of the universe in modified theories of gravity
• Future Oscillations around Phantom Divide in f(R) Gravity
• Focusing of geodesic congruences in an accelerated expanding Universe
• Dark Energy Fluid with Time-Dependent, Inhomogeneous Equation of State
• Crossing of Phantom Divide in $F(R)$ Gravity

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