The mixed phase quark core in massive hybrid stars

Abstract

We investigate the properties of hybrid star and the mixed phase core to explore the radius ratio of the mixed phase in hybrid star. In the context of observed massive neutron stars (NSs), we examine the internal structure, phase transitions, and the impacts of the equation of state (EOS) in maximum hybrid star. We investigate the stiffness changes in the EOS during the hadron-quark phase transition within the hybrid stars. The relativistic mean-field (RMF) model is used to describe hadronic matter, while to the represent quark matter, the Nambu-Jona-Lasinio (NJL) model is applied. We explore the strength of vector coupling in quark matter, which delays the onset density of the mixed phase and reduces the size of the mixed-phase core in a hybrid star, but does not exhibit a clear correlation with the central density. In a hybrid star with a maximum mass of approximately 2 solar masses ($M_{\odot }$), a mixed-phase core of $\sim$5 km may exist, comprising about $40\%$ of the total radius. However, our results do not support the existence of a sizable quark core containing the mixed phase ($R_{\mathrm{MP}}>1/2R_{\mathrm{total}}$) for the maximum-mass hybrid star or for a 2~$M_{\odot }$ massive star.

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References in corpus (37)

• A Massive Pulsar in a Compact Relativistic Binary
• PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter
• A NICER View of PSR J0030+0451: Millisecond Pulsar Parameter Estimation
• Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar
• A New Parameterization for the Lagrangian Density of Relativistic Mean Field Theory
• A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy
• Gravitational-wave constraints on the neutron-star-matter Equation of State
• Refined Mass and Geometric Measurements of the High-Mass PSR J0740+6620
• Strange Quark Matter and Compact Stars
• From hadrons to quarks in neutron stars: a review
• Evidence for quark-matter cores in massive neutron stars
• PSR J0952-0607: The Fastest and Heaviest Known Galactic Neutron Star
• Identifying a first-order phase transition in neutron star mergers through gravitational waves
• Hadronization in the SU(3) Nambu-Jona-Lasinio Model
• The phase diagram of neutral quark matter: Self-consistent treatment of quark masses
• Hadron-Quark Crossover and Massive Hybrid Stars with Strangeness
• GW190814: Impact of a 2.6 solar mass neutron star on nucleonic equations of state
• Vector interaction enhanced bag model for astrophysical applications
• Finite-size effects at the hadron-quark transition and heavy hybrid stars
• Treating quarks within neutron stars
• Merger and post-merger of binary neutron stars with a quark-hadron crossover equation of state
• Evidence against a strong first-order phase transition in neutron star cores: impact of new data
• Signatures for quark matter from multi-messenger observations
• Effects of the symmetry energy on properties of neutron star crusts near the neutron drip density
• Relativistic hybrid stars in light of the NICER PSR J0740+6620 radius measurement
• Quark magnetar in three-flavor Nambu--Jona-Lasinio model with vector interaction and magnetized gluon potential
• Two-solar-mass hybrid stars: a two model description with the Nambu-Jona-Lasinio quark model
• Quark deconfinement transition in hyperonic matter
• Nuclear symmetry energy and hadron-quark mixed phase in neutron stars
• Relativistic hybrid stars with sequential first-order phase transitions in light of multimessenger constraints
• Could a slow stable hybrid star explain the central compact object in HESS~J1731-347?
• Effects of quark-matter symmetry energy on hadron-quark coexistence in neutron-star matter
• Symmetry energy effect on the secondary component of GW190814 as a neutron star
• Constraints on Density Dependent MIT Bag Model Parameters for Quark and Hybrid Stars
• Hybrid stars with large strange quark cores constrained by GW170817
• Properties of quark matter and hybrid stars from a quasiparticle model
• Properties of quark-matter cores in massive hybrid stars