Jaime Román-GarzaTomás VerdugoJuan MagañaMotta, VerónicaVerónicaMotta2025-04-142025-04-142019-1110.1140/epjc/s10052-019-7390-3https://cris-uv-2.scimago.es/handle/123456789/2341WOS:000499628400003In this paper, we propose a new phenomenological two parameter parameterization of q(z) to constrain barotropic dark energy models by considering a spatially flat Universe, neglecting the radiation component, and reconstructing the effective equation of state (EoS). This two free-parameter EoS reconstruction shows a non-monotonic behavior, pointing to a more general fitting for the scalar field models, like thawing and freezing models.acceso abiertoPHYSICS PARTICLES FIELDSjournal-article