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A generalized equation of state for dark energy
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A generalized equation of state for dark energy
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A generalized parameterization $w_\beta(z)$ for the dark energy equation of state (EoS) is proposed and some of its cosmological consequences are investigated. We show that in the limit of the characteristic dimensionless parameter $\beta \to +1, 0$ and -1 some well-known EoS parameterizations are fully recovered whereas for other values of $\beta$ the proposed parameterization admits a wider and new range of cosmological solutions. We also discuss possible constraints on the $w_\beta(z)$ parameters from current observational data.
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Cited by 1 Pith paper
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How Complex is Dark Energy? A Bayesian Analysis of CPL Extensions with Recent DESI BAO Measurements
Bayesian evidence from DESI BAO plus CMB and SN data favors the standard CPL evolving dark energy model over both simpler constant-w and more complex higher-order extensions.
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