Formation of hybrid stars from metastable hadronic stars

Abstract

We study the consequences of quark matter nucleation in cold hadronic matter employing three relativistic-mean-field (RMF) models to describe the hadronic phase and the Nambu-Jona-Lasinio (NJL) model for the quark one. We explore the effect of a vector interaction in the NJL Lagrangian and of a phenomenological bag constant on neutron stars metastability. We delineate the region of parameters of the quark phase that allow for the formation of stable hybrid stars with mass compatible with the almost $2M_{\odot }$ pulsars PSR J1614-2230 ($1.97\pm 0.04M_{\odot }$) and PSR J0348+0432 ($2.01\pm 0.04M_{\odot }$). It is shown, however, that not all hybrid star configurations with $\sim 2M_{\odot }$ are populated after nucleation.

Accepted for publication in Phys. Rev. C

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• Hyperonic stars and the symmetry energy
• Equation of state for neutron stars with hyperons and quarks in relativistic Hartree-Fock approximation
• Two-solar-mass hybrid stars: a two model description with the Nambu-Jona-Lasinio quark model
• Hybrid Stars using the Quark-Meson Coupling and Proper Time NJL Models
• Repulsive Vector Interaction in Three Flavor Magnetized Quark and Stellar Matter
• Finite-size effects on the hadron-quark phase transition in neutron stars
• Nuclear symmetry energy and hadron-quark mixed phase in neutron stars
• Neutron stars with large quark cores
• Quark matter in light neutron stars
• Dynamical Generation of a Repulsive Vector Contribution to the Quark Pressure
• Hadron-quark phase transition in the SU(3) local Nambu-Jona-Lasinio (NJL) model with vector interaction
• Effects of Hadron-Quark Phase Transitions in Hybrid Stars within the NJL Model
• Hybrid Equations of State for Neutron Stars with Hyperons and Deltas
• Hybrid stars with large strange quark cores constrained by GW170817
• Dark matter and bubble nucleation in old neutron stars
• Modern nuclear and astrophysical constraints of dense matter in a renormalized chiral approach
• Hard-core Radius of Nucleons within the Induced Surface Tension Approach
• Hybrid star within the framework of a lowest-order constraint variational method
• Role of the conserved charges in the chiral symmetry restoration phase transition
• Hadron-quark phase transition in neutron star by combining the relativistic Brueckner-Hartree-Fock theory and Dyson-Schwinger equation approach