Relativistic description of dense matter equation of state and compatibility with neutron star observables: a Bayesian approach

Abstract

The general behavior of the nuclear equation of state (EOS), relevant for the description of neutron stars (NS), is studied within a Bayesian approach applied to a set of models based on a density dependent relativistic mean field description of nuclear matter. The EOS is subjected to a minimal number of constraints based on nuclear saturation properties and the low density pure neutron matter EOS obtained from a precise next-to-next-to-next-to-leading order (N${}^3$LO) calculation in chiral effective field theory ($\chi$EFT). The posterior distributions of the model parameters obtained under these minimal constraints are employed to construct the distributions of various nuclear matter properties and NS properties such as radii, tidal deformabilites, central energy densities and speeds of sound etc. We found that 90% confidence interval (CI) for allowed NS mass - radius relationship and tidal deformabilites are compatible with GW170817 and recent NICER observations, without invoking the exotic degrees of freedom. A central speed-of-sound of the order of $\sqrt{2/3}$ $c$ is obtained. The maximum neutron star mass allowed by the model is 2.5 $M_{\odot }$.

20 pages, 11 figures (Accepted in ApJ)

References in corpus (28)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• Multi-messenger Observations of a Binary Neutron Star Merger
• Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
• 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
• Tidal Love numbers of neutron stars
• Neutron-Rich Nuclei in Heaven and Earth
• GW170817: Joint Constraint on the Neutron Star Equation of State from Multimessenger Observations
• Cold Quark Matter
• Relativistic Mean-Field Hadronic Models under Nuclear Matter Constraints
• Neutron matter at next-to-next-to-next-to-leading order in chiral effective field theory
• Sound velocity bound and neutron stars
• Incompressibility in finite nuclei and nuclear matter
• Density dependence of the nuclear symmetry energy: a microscopic perspective
• Towards Understanding Astrophysical Effects of Nuclear Symmetry Energy
• Revisiting the lower bound on tidal deformability derived by AT 2017gfo
• PSR J1810+1744: Companion Darkening and a Precise High Neutron Star Mass
• The pasta phase within density dependent hadronic models
• The Vlasov formalism for extended relativistic mean field models: the crust-core transition and the stellar matter equation of state
• Implications of the mass $M=2.17_{-0.10}^{+0.11}$M${}_{\odot }$ of PSR~J0740+6620 on the Equation of State of Super-Dense Neutron-Rich Nuclear Matter
• Relativistic hypernuclear compact stars with calibrated equations of state
• Thermal evolution of relativistic hyperonic compact stars with calibrated equations of state
• Bayesian reconstruction of nuclear matter parameters from the equation of state of neutron star matter
• Constraints on high density equation of state from maximum neutron star mass
• Determination of the symmetry energy from the neutron star equation of state

Cited by in corpus (44)

• The Science of the Einstein Telescope
• Exploring QCD matter in extreme conditions with Machine Learning
• Spanning the full range of neutron star properties within a microscopic description
• Compact Binary Coalescences: Astrophysical Processes and Lessons Learned
• Astrophysical implications on hyperon couplings and hyperon star properties with relativistic equations of states
• Nucleonic metamodelling in light of multimessenger, PREX-II and CREX data
• Bayesian inference of signatures of hyperons inside neutron stars
• Bayesian Inference of the Dense Matter Equation of State built upon Covariant Density Functionals
• Nearly model-independent constraints on dense matter equation of state in a Bayesian approach
• Bayesian refinement of covariant energy density functionals
• Extracting nuclear matter properties from the neutron star matter equation of state using deep neural networks
• Impact of Symmetry Energy on Sound Speed and Spinodal Decomposition in Dense Neutron-Rich Matter
• Bayesian inference of neutron-star observables based on effective nuclear interactions
• Decoding Neutron Star Observations: Revealing Composition through Bayesian Neural Networks
• Radial Oscillations in Neutron Stars with Delta Baryons
• Non-strange quark stars within resummed QCD
• Frequencies of $f$- and $p$-oscillation modes in cold and hot compact stars
• From NS observations to nuclear matter properties: a machine learning approach
• Bayesian inference of the dense matter equation of state built upon extended Skyrme interactions
• Bayesian constraints on covariant density functional equations of state of compact stars with new NICER mass-radius measurements
• Novel Scalings of Neutron Star Properties from Analyzing Dimensionless Tolman--Oppenheimer--Volkoff Equations
• Bayesian Inference of dense matter equation of state of neutron star with antikaon condensation
• Constraining neutron star matter from the slope of the mass-radius curves
• Nambu-Jona-Lasinio description of hadronic matter from a Bayesian approach
• Quarkyonic matter and quarkyonic stars in an extended RMF model
• Realizing the potential of deep neural network for analyzing neutron star observables and dense matter equation of state
• Bayesian inferences on covariant density functionals from multimessenger astrophysical data: Nucleonic models
• Unraveling the global behavior of equation of state by explicit finite nuclei constraints
• Inferring the Equation of State from Neutron Star Observables via Machine Learning
• Nonparametric extensions of nuclear equations of state: probing the breakdown scale of relativistic mean-field theory
• Density-dependent relativistic mean field approach and its application to single-$\Lambda$ hypernuclei in Oxygen isotopes
• Neutron star equation of state: identifying hadronic matter characteristics
• Exploring $\Delta$-resonance in neutron stars: implications from astrophysical and nuclear observations
• Detecting Hyperons in neutron stars -- a machine learning approach
• Investigating the role of nuclear parameters in Neutron Star oscillations: a model comparison
• Non-Radial Oscillation Modes in Hybrid Stars with Hyperons and Delta Baryons
• Conditional variational autoencoder inference of neutron star equation of state from astrophysical observations
• Comparing strange and non-strange quark stars within resummed QCD at NLO
• Astrophysical constraints on the cold equation of state of the strongly interacting matter
• Modification of the universal relation between mass, radius and nonradial $f$-mode oscillation in proto-neutron stars
• Inferring the nuclear symmetry energy at supra saturation density from neutrino cooling
• Stellar equilibrium on a physical vacuum soil
• Learning about neutron star composition from the slope of the mass-radius diagram
• Bayesian inferences on covariant density functionals from multimessenger astrophysical data: Influences of parametrizations of density dependent couplings