Structure of hybrid protoneutron stars within the Nambu--Jona-Lasinio model

Abstract

We investigate the structure of protoneutron stars (PNS) formed by hadronic and quark matter in $\beta$-equilibrium described by appropriate equations of state (EOS). For the hadronic matter, we use a finite temperature EOS based on the Brueckner-Bethe-Goldstone many-body theory, with realistic two- and three-body forces. For the quark sector, we employ the Nambu--Jona-Lasinio model. We find that the maximum allowed masses are comprised in a narrow range around 1.8 solar masses, with a slight dependence on the temperature. Metastable hybrid protoneutron stars are not found.

7 pages, 6 figures, revised version accepted for publication in Phys. Rev. D

References in corpus (3)

• Hybrid protoneutron stars with the MIT bag model
• Evolutionary sequences of rotating protoneutron stars
• Quark matter in neutron stars within the Nambu - Jona-Lasinio model and confinement

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• Warm asymmetric quark matter and proto-quark stars within the confined-isospin-density-dependent mass model
• Phases of Hadron-Quark Matter in (Proto) Neutron Stars
• Characterizing the quark-hadron mixed phase in compact star cores : sensitivity to nuclear saturation and quark-model parameters at finite-temperature