Thermodynamic parametrization of dark energy
Capozziello S. DAgostino R. Luongo O.
June 2022Elsevier B.V.
Physics of the Dark Universe
2022#36
We propose a new parametrization of dark energy motivated by thermodynamics. To this aim, we consider Padé polynomials to reconstruct the form of deceleration parameter adequate to describe different epochs of cosmic history and divergence-free in the far future. The proposed scenario also fulfils the demand of structure formation and contains the ΛCDM model as a limiting case. Thus, a numerical analysis at both background and perturbation levels is performed through the Markov Chain Monte Carlo method in view of the most recent cosmic data. We then use the observational constraints to explore the features of dark energy evolution and compare our findings with the predictions of the standard cosmological model.
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Dipartimento di Fisica “E. Pancini”, Università di Napoli “Federico II”, Via Cinthia 9, Napoli, 80126, Italy
Scuola Superiore Meridionale, Largo S. Marcellino 10, Napoli, 80138, Italy
Istituto Nazionale di Fisica Nucleare (INFN), Sez. di Napoli, Via Cinthia 9, Napoli, 80126, Italy
Laboratory for Theoretical Cosmology, International Centre of Gravity and Cosmos, Tomsk State University of Control Systems and Radioelectronics (TUSUR), 634050 Tomsk, Russian Federation
Dipartimento di Matematica, Università di Pisa, Largo B. Pontecorvo, Pisa, 56127, Italy
Università di Camerino, Divisione di Fisica, Via Madonna delle carceri, Camerino, 62032, Italy
NNLOT, Al-Farabi Kazakh National University, Al-Farabi av. 71, Almaty, 050040, Kazakhstan
Dipartimento di Fisica “E. Pancini”
Scuola Superiore Meridionale
Istituto Nazionale di Fisica Nucleare (INFN)
Laboratory for Theoretical Cosmology
Dipartimento di Matematica
Università di Camerino
NNLOT
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