Quark Deconfinement in Rotating Neutron Stars
arXiv:1701.07343 · doi:10.3390/universe3010005
Abstract
In this paper, we use a three flavor non-local Nambu--Jona-Lasinio (NJL) model, an~improved effective model of Quantum Chromodynamics (QCD) at low energies, to investigate the existence of deconfined quarks in the cores of neutron stars. Particular emphasis is put on the possible existence of quark matter in the cores of rotating neutron stars (pulsars). In contrast to non-rotating neutron stars, whose particle compositions do not change with time (are frozen in), the type and structure of the matter in the cores of rotating neutron stars depends on the spin frequencies of these stars, which opens up a possible new window on the nature of matter deep in the cores of neutron stars. Our study shows that, depending on mass and rotational frequency, up to around 8% of the mass of a massive neutron star may be in the mixed quark-hadron phase, if the phase transition is treated as a Gibbs transition. We also find that the gravitational mass at which quark deconfinement occurs in rotating neutron stars varies quadratically with spin frequency, which can be fitted by a simple formula.
arXiv comment16 pages, 6 figures
References in corpus (47)
- Shapiro delay measurement of a two solar mass neutron star
- A Massive Pulsar in a Compact Relativistic Binary
- The ATNF Pulsar Catalogue
- Neutron Star Structure and the Equation of State
- Color superconductivity in dense quark matter
- NJL-model analysis of dense quark matter
- Composition and thermodynamics of nuclear matter with light clusters
- A Radio Pulsar Spinning at 716 Hz
- Strange Quark Matter and Compact Stars
- Equation of state and neutron star properties constrained by nuclear physics and observation
- The NANOGrav Nine-year Data Set: Mass and Geometric Measurements of Binary Millisecond Pulsars
- Phase diagrams in the three-flavor Nambu--Jona-Lasinio model with the Polyakov loop
- Constraints on the high-density nuclear equation of state from the phenomenology of compact stars and heavy-ion collisions
- Symmetry Energy II: Isobaric Analog States
- Density Dependent Hadron Field Theory
- Composition and stability of hybrid stars with hyperons and quark color-superconductivity
- Constraining neutron star matter with QCD
- Constraints on the Symmetry Energy Using the Mass-Radius Relation of Neutron Stars
- Neutron matter from chiral effective field theory interactions
- Dense Matter in Compact Stars: Theoretical Developments and Observational Constraints
- Incompressibility in finite nuclei and nuclear matter
- Hadron-Quark Crossover and Massive Hybrid Stars with Strangeness
- Signal of Quark Deconfinement in the Timing Structure of Pulsar Spin-Down
- Modern compact star observations and the quark matter equation of state
- The Green Bank Telescope 350 MHz Drift-scan Survey II: Data Analysis and the Timing of 10 New Pulsars, Including a Relativistic Binary
- Role of Vector Interaction and Axial Anomaly in the PNJL Modeling of the QCD Phase Diagram
- Quark deconfinement in high-mass neutron stars
- Droplets in the cold and dense linear sigma model with quarks
- Finite-size effects at the hadron-quark transition and heavy hybrid stars
- The physics of dense hadronic matter and compact stars
- Application of the density dependent hadron field theory to neutron star matter
- Quark Number Fluctuations in a Chiral Model at Finite Baryon Chemical Potential
- The Surface Tension of Quark Matter in a Geometrical Approach
- Phase diagram and surface tension in the three-flavor Polyakov-quark-meson model
- Charge Screening at First Order Phase Transitions
- Quark-hybrid matter in the cores of massive neutron stars
- Nonlocal SU(3) chiral quark models at finite temperature: the role of the Polyakov loop
- Hybrid stars in the light of the massive pulsar PSR J1614-2230
- The Constant-Sound-Speed parameterization for NJL models of quark matter in hybrid stars
- Hybrid stars within a covariant, nonlocal chiral quark model
- Meson properties at finite temperature in a three flavor nonlocal chiral quark model with Polyakov loop
- Hybrid stars with color superconductivity within a nonlocal chiral quark model
- Possible evidence of quark matter in neutron star X-ray binaries
- Neutrino emissivity in the quark-hadron mixed phase of neutron stars
- Population clustering as a signal for deconfinement in accreting compact stars
- Signature of deconfinement with spin down compression in cooling hybrid stars
- Hybrid Stars in the Framework of different NJL Models
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- Tidal deformability and other global parameters of compact stars with strong phase transitions
- nEoS: Neutron Star Equation of State from hadron physics alone
- Moment of inertia, quadrupole moment, Love number of neutron star and their relations with strange matter equations of state
- Strong-interaction matter under extreme conditions from chiral quark models with nonlocal separable interactions
- Neutron star equation of state and GW170817
- Thermodynamics of a rotating hadron resonance gas with van der Waals interaction
- Properties of binary components and remnant in GW170817 using equations of state in finite temperature field theory models
- Effects of hadron-quark phase transition on properties of Neutron Stars
- A Quark-Nova in the wake of a core-collapse Supernova: a unifying model for long duration Gamma-Ray Bursts and Fast Radio Bursts
- Rotating Hybrid Stars with Color-Flavor-Locked Quark Matter
- Ridges in rotating neutron-star properties due to first order phase transitions
- Rotational Properties of Inverted Hybrid Stars
- Rotation-driven phase transitions in the cores of pulsars