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

Cited by in corpus (1)

• Lepton effects on the proto-neutron stars with the hadron-quark mixed phase in the Nambu-Jona-Lasinio model