A Bayesian analysis of the properties of hybrid stars with the NJL model

Abstract

We implement a Bayesian analysis of the properties of non-rotating hybrid stars at equilibrium with quark matter cores, as described by the SU(3) Nambu--Jona-Lasinio (NJL) model. The hadronic phase is described by a unified metamodeling approach, with a prior parameter space covering the present uncertainties on nuclear matter properties with nucleonic degrees of freedom. The parameter space of the NJL model includes vector-isoscalar and vector-isovector couplings and, additionally, an effective bag constant for the quark pressure is introduced as a free parameter. The phase transition is assumed to be first order with charge neutral phases, following the Maxwell construction. Our Bayesian framework includes filters on the experimental and theoretical low-density nuclear physics knowledge (atomic masses, ab initio calculations of the EoS) and high density constraints from astrophysical observations (maximum mass of J0348+0432, binary tidal deformability of the GW170817 event). We find that microscopic vector interactions play an important role in quark matter in order to stiffen the equation of state sufficiently to reach high star masses, in agreement with previous studies. Even within a very large prior for both the hadronic phase and the quark phase and the important freedom brought by the effective bag constant, our posterior quark cores tend to be relatively small and only appear in very heavy stars ($M\gtrsim 2M_{\odot }$). Coincidentally, the inclusion of the nucleon-quark transition (deconfinement transition) only weakly affects the radii of compact stars, foreshadowing a very low observability of a possible phase transition using x-ray radii measurements.

References in corpus (72)

• A Massive Pulsar in a Compact Relativistic Binary
• The order of the quantum chromodynamics transition predicted by the standard model of particle physics
• GW190814: Gravitational Waves from the Coalescence of a 23 M${}_{\odot }$ Black Hole with a 2.6 M${}_{\odot }$ Compact Object
• 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
• QCD Phenomenology based on a Chiral Effective Lagrangian
• Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar
• Color superconductivity in dense quark matter
• NJL-model analysis of dense quark matter
• Instantons in QCD
• Tidal Love numbers of neutron stars
• Properties of the binary neutron star merger GW170817
• The equation of state in (2+1)-flavor QCD
• The chiral and deconfinement aspects of the QCD transition
• Refined Mass and Geometric Measurements of the High-Mass PSR J0740+6620
• The QCD transition temperature: results with physical masses in the continuum limit
• Is there still any Tc mystery in lattice QCD? Results with physical masses in the continuum limit III
• The QCD phase structure at finite temperature and density
• Hadronization in the SU(3) Nambu-Jona-Lasinio Model
• Quarkyonic Matter and Neutron Stars
• Composition and stability of hybrid stars with hyperons and quark color-superconductivity
• The equation of state for dense nucleonic matter from a metamodeling. I. Foundational aspects
• The phase diagram of three-flavor quark matter under compact star constraints
• Asymmetric nuclear matter based on chiral two- and three-nucleon interactions
• Chiral Effective Field Theory and the High-Density Nuclear Equation of State
• The equation of state for dense nucleonic matter from a meta-modeling. II. Predictions for neutron stars properties
• Constraining the nuclear equation of state at subsaturation densities
• Hadron-Quark Crossover and Massive Hybrid Stars
• Neutron Star Equation of State in light of GW190814
• Constraining the equation of state of high-density cold matter using nuclear and astronomical measurements
• New class of hybrid EoS and Bayesian M-R data analysis
• Neutron stars and quark phases in the NJL model
• Quark-Nuclear Hybrid EoS with Excluded Volume Effects
• Baryon number fluctuations in the QCD phase diagram from Dyson-Schwinger equations
• Equation of state for hot QCD and compact stars from a mean field approach
• Directed, elliptic and higher order flow harmonics of protons, deuterons and tritons in Au+Au collisions at $\sqrt{s_{NN}}=2.4$ GeV
• Stability of CFL cores in Hybrid Stars
• Warm stellar matter with deconfinement: application to compact stars
• Was GW170817 a canonical neutron star merger? Bayesian analysis with a third family of compact stars
• Bayesian analysis of the crust-core transition with a compressible liquid-drop model
• Charge screening effect in the hadron-quark mixed phase
• Hybrid equation of state with pasta phases and third family of compact stars
• The Chiral Phase Transition and Instanton Anti-instanton Molecules
• Hybrid and quark star matter based on a non-perturbative equation of state
• Bayesian inference of dense matter EOS encapsulating a first-order hadron-quark phase transition from observables of canonical neutron stars
• Multi-messenger and multi-physics Bayesian inference for GW170817 binary neutron star merger
• Two-solar-mass hybrid stars: a two model description with the Nambu-Jona-Lasinio quark model
• Uncertainties in the pasta-phase properties of catalysed neutron stars
• Constraining hadron-quark phase transition parameters within the quark-mean-field model using multimessenger observations of neutron stars
• Thermodynamics of the 3-flavor NJL model : chiral symmetry breaking and color superconductivity
• Modified MIT Bag Models -- part II: QCD phase diagram and hot quark stars
• Neutron stars with large quark cores
• Upper limit set by causality on the tidal deformability of a neutron star
• Systematic study on the quark-hadron mixed phase in compact stars
• Anomalous thermodynamics and phase transitions of neutron-star matter
• Studies of the structure of massive hybrid stars within a modified NJL model
• Constraint on phase transition with the multimessenger data of neutron stars
• Bayesian inference of quark star equation of state using the NICER PSR J0030+0451 data
• Hybrid neutron stars in the mass-radius diagram
• Chiral pasta
• Bayesian Analysis for Extracting Properties of the Nuclear Equation of State from Observational Data including Tidal Deformability from GW170817
• Vector-Interaction-Enhanced Bag Model
• Hadron-quark phase transition in the SU(3) local Nambu-Jona-Lasinio (NJL) model with vector interaction
• Ising analogue to compact-star matter
• New Bayesian analysis of hybrid EoS constraints with mass-radius data for compact stars
• Hybrid stars with large strange quark cores constrained by GW170817
• Implications of the fermion vacuum term in the extended SU(3) Quark Meson model on compact stars properties
• Studying the parameters of the extended $\sigma$-$\omega$ model for neutron star matter
• Quantifying the uncertainties on spinodal instability in stellar matter through meta-modeling
• Thermodynamical phases in a PNJL model at zero temperature
• Sensitivity of predictions in an effective model -- application to the chiral critical end point position in the Nambu--Jona-Lasinio model
• Hybrid stars from a three-flavor NJL model with two kinds of tensor condensates

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• Medium Effects in MIT Bag Model for quark matter: Self consistent thermodynamical treatment
• Comprehensive Analysis of Constructing Hybrid Stars with an RG-consistent NJL Model
• Is the central compact object in HESS J1731-347 a hybrid star with a quark core? An analysis with the constant speed of sound parametrization
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• Scalarized Hybrid Neutron Stars in Scalar Tensor Gravity
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