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A parametric model for dark energy · Around

2008

A parametric model for dark energy

Barboza Jr., E. M., Alcaniz, J. S.

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Determining the mechanism behind the current cosmic acceleration constitutes a major question nowadays in theoretical physics.

If the dark energy route is taken, this problem may potentially bring to light new insights not only in Cosmology but also in high energy physics theories.
Following this approach, we explore in this paper some cosmological consequences of a new time-dependent parameterization for the dark energy equation of state (EoS), which is a well behaved function of the redshift $z$ over the entire cosmological evolution, i.e., $z\in [-1,\infty)$.
This parameterization allows us to divide the parametric plane $(w_0,w_1)$ in defined regions associated to distinct classes of dark energy models that can be confirmed or excluded from a confrontation with current observational data.

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