Constraints on barotropic dark energy models by a new phenomenological q(z) parameterization Jaime Román-Garza, Tomás Verdugo, Juan Magaña and Verónica Motta Eur. Phys. J. C, 79 11 (2019) 890 Published online: 05 November 2019 DOI: 10.1140/epjc/s10052-019-7390-3