Browsing by Author "Anibal Contrera, Gustavo"

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    Effects of Hadron-Quark Phase Transitions in Hybrid Stars within the NJL Model
    (2019) Francisco Ranea-Sandoval, Ignacio; Gabriela Orsaria, Milva; Malfatti, German; Curin, Daniela; Mariani, Mauro; Anibal Contrera, Gustavo; Miguel Guilera, Octavio
    We study local and non-local Polyakov Nambu-Jona-Lasinio models and analyze their respective phase transition diagram. We construct hybrid stars using the zero temperature limit of the local and non-local versions of Nambu-Jona-Lasinio model for quark matter and the modern GM1(L) parametrization of the non-linear relativistic mean field model for hadronic matter. We compare our models with data from PSR J1614-2230 and PSR J0343+0432 and also from GW170817 and its electromagnetic counterpart GRB170817A and AT2017gfo. We study observational signatures of the appearance of a mixed phase as a result of modeling a phase transition that mimics the Gibbs formalism and compare the results with the sharp first-order phase transition obtained using the Maxwell construction. We also study in detail the g-mode associated with discontinuities in the equation of state, and calculate non-radial oscillation modes using relativistic Cowling approximation.