Massive hybrid stars with a first order phase transition

Abstract

We develop our previous study of the transition to deconfined quark phase in neutron stars, including the interaction in the quark equation of state to the leading order in the perturbative expansion within the confinement density-dependent mass model. Using the Gibbs conditions the hadron-quark mixed phase is constructed matching the latter with the hadron equation of state derived from the microscopic Brueckner-Hartree-Fock approximation. The influence of quark interaction parameters on threshold properties and phase diagram of dense neutron star matter are discussed in detail. We find that the leading-order quark interaction expands the density range of the mixed phase, pushing forward the disappearance of the hadron phase. Moreover, since the equation of state could turn out to be stiffer, a high-mass hybrid star is possible with mixed-phase core with typical parameter sets.

6 pages, 5 figures, Phys. Rev. C (2015) accepted

References in corpus (9)

• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• The order of the quantum chromodynamics transition predicted by the standard model of particle physics
• Deconfinement phase transition in hybrid neutron stars from the Brueckner theory with three-body forces and a quark model with chiral mass scaling
• Thermodynamics with density and temperature dependent particle masses and properties of bulk strange quark matter and strangelets
• Thermodynamic consistency, quark mass scaling, and properties of strange matter
• Microscopic three-body forces and kaon condensation in cold neutrino-trapped matter
• Protoneutron stars in the Brueckner-Hartree-Fock approach and finite-temperature kaon condensation
• Chiral Condensates in Quark and nuclear Matter

Cited by in corpus (5)

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• Systematic study on the quark-hadron mixed phase in compact stars
• Properties of Hybrid Stars with Density Dependent Bag Model
• Maximum Mass of Hybrid Stars in the Quark Bag Model
• Two-flavor hybrid stars with the Dyson-Schwinger quark model