PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter

Abstract

Neutron stars are not only of astrophysical interest, but are also of great interest to nuclear physicists, because their attributes can be used to determine the properties of the dense matter in their cores. One of the most informative approaches for determining the equation of state of this dense matter is to measure both a star's equatorial circumferential radius $R_e$ and its gravitational mass $M$. Here we report estimates of the mass and radius of the isolated 205.53 Hz millisecond pulsar PSR J0030+0451 obtained using a Bayesian inference approach to analyze its energy-dependent thermal X-ray waveform, which was observed using the Neutron Star Interior Composition Explorer (NICER). This approach is thought to be less subject to systematic errors than other approaches for estimating neutron star radii. We explored a variety of emission patterns on the stellar surface. Our best-fit model has three oval, uniform-temperature emitting spots and provides an excellent description of the pulse waveform observed using NICER. The radius and mass estimates given by this model are $R_e=13.02_{-1.06}^{+1.24}$ km and $M=1.44_{-0.14}^{+0.15}{M}_{\odot }$ (68%). The independent analysis reported in the companion paper by Riley et al. (2019) explores different emitting spot models, but finds spot shapes and locations and estimates of $R_e$ and $M$ that are consistent with those found in this work. We show that our measurements of $R_e$ and $M$ for PSR J0030$+$0451 improve the astrophysical constraints on the equation of state of cold, catalyzed matter above nuclear saturation density.

49 pages, 16 figures, part of The Astrophysical Journal Letters focus issue on the Neutron Star Interior Composition Explorer

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• Constraints on the dense matter equation of state and neutron star properties from NICER's mass-radius estimate of PSR J0740+6620 and multimessenger observations
• The Equation of State of Neutron-Rich Matter at Fourth Order of Chiral Effective Field Theory and the Radius of a Medium-Mass Neutron Star
• Effect of the $\sigma$-cut potential on the properties of neutron stars with or without a hyperonic core
• Massive relativistic compact stars from SU(3) symmetric quark models
• Magnetically confined mountains on accreting neutron stars with multipole magnetic fields
• Hybrid stars with reactive interfaces: analysis within the Nambu-Jona-Lasinio model
• Non-equilibrium effects on stability of hybrid stars with first-order phase transitions
• 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
• Strange Quark Stars and Condensate Dark Stars in Bumblebee Gravity
• Discovery of Polarized X-Ray Emission from the Accreting Millisecond Pulsar SRGA J144459.2-604207
• Speed of sound bounds and first-order phase transitions in compact stars
• Impact of the nuclear equation of state on the formation of twin stars
• Constraining neutron star matter from the slope of the mass-radius curves
• Influence of pressure anisotropy and non-metricity parameter on mass-radius relation and stability of millisecond pulsar in $f(Q)$ gravity
• Neural Simulation-Based Inference of the Neutron Star Equation of State directly from Telescope Spectra
• A new criterion for the existence of dark matter in neutron stars
• What if GW190425 did not produce a black hole promptly?
• Quark-hadron pasta phase in neutron stars: the role of medium-dependent surface and curvature tensions
• Hybrid Stars Built with Density Dependent Models
• Radial and Non-Radial Oscillations of Inverted Hybrid Stars
• Neutron Stars in Modified Teleparallel Gravity
• Emergence of new oscillation modes in dark matter admixed neutron stars
• Measuring the Lense-Thirring Orbital Precession and the Neutron Star Moment of Inertia with Pulsars
• Pulse Profile Modeling of Thermonuclear Burst Oscillations I: The Effect of Neglecting Variability
• Constraints on conformal ultralight dark matter couplings from the European Pulsar Timing Array
• Constraining the properties of dense neutron star cores: The case of the low-mass X-ray binary HETE J1900.1-2455
• Experimental study of the isospin transport with 40,48 Ca+ 40,48 Ca reactions at 35 MeV/nucleon
• Role of the symmetry energy slope in neutron stars: exploring the model-dependency
• Imprints of the nuclear symmetry energy slope in gravitational wave signals emanating from neutron stars
• Tidal Deformability Doppelgangers: Implications of a low-density phase transition in the neutron star equation of state
• Shear and interface modes in neutron stars with pasta structures
• Empirical neutron star mass formula based on experimental observables
• Correlation of the hyperon potential stiffness with hyperon constituents in neutron stars and heavy-ion collisions
• Neutron matter from local chiral effective field theory interactions at large cutoffs
• Modern nuclear and astrophysical constraints of dense matter in a renormalized chiral approach
• Establishing connection between neutron star properties and nuclear matter parameters through a comprehensive multivariate analysis
• Geometric and thermodynamic characterization of binary neutron star accretion discs
• Relativistic correction to the r-mode frequency in light of multi-messenger constraints
• Universal Relations for rapidly rotating neutron stars using supervised machine-learning techniques
• Assessing equation of state-independent relations for neutron stars with nonparametric models
• Nonparametric Representation of Neutron Star Equation of State Using Variational Autoencoder
• Gravitational waves from neutron-star mountains
• Prospects for Direct Detection of Black Hole Formation in Neutron Star Mergers with Next-Generation Gravitational-Wave Detectors
• Emulators for scarce and noisy data: application to auxiliary field diffusion Monte Carlo for the deuteron
• Fuzzy Dark Matter in Relativistic Stars
• Multi-messenger prospects for black hole - neutron star mergers in the O4 and O5 runs
• Nambu-Jona-Lasinio description of hadronic matter from a Bayesian approach
• Detecting dense-matter phase transition signatures in neutron star mass-radius measurements as data anomalies using normalising flows
• Extended NJL model for baryonic matter and quark matter
• Relativistic force-free models of the thermal X-ray emission in millisecond pulsars observed by NICER
• Shear oscillations in neutron stars and the nuclear symmetry energy
• Prospects for optical detections from binary neutron star mergers with the next-generation multi-messenger observatories
• How does dark matter affect compact star properties and high density constraints of strongly interacting matter
• Tabulated Equations of State From Models Informed by Chiral Effective Field Theory
• Differentially rotating scalarized neutron stars with realistic post-merger profile
• Dark matter admixed neutron stars with a realistic nuclear equation of state from chiral nuclear interactions
• Polytropic fits of modern and unified equations of state
• Constraining the magnetic field geometry of the millisecond pulsar PSR~J0030+0451 from joint radio, thermal X-ray and $\gamma$-ray emission
• Minimal Length, Nuclear Matter, and Neutron Stars
• Impact of nuclear matter properties on the nucleosynthesis and the kilonova from binary neutron star merger ejecta
• Intensity and Polarization Characteristics of Extended Neutron Star Surface Regions
• The rocket effect mechanism in neutron stars in supernova remnants
• Exploring the Fate of Stellar Core Collapse with Supernova Relic Neutrinos
• Effects of nuclear matter and composition in core-collapse supernovae and long-term proto-neutron star cooling
• SU(3) parity doubling in cold neutron star matter
• Effects of Onset of Phase Transition on Binary Neutron Star Mergers
• Direct mapping of tidal deformability to the iso-scalar and iso-vector nuclear matter parameters
• Detectability of Sub-Solar Mass Neutron Stars Through a Template Bank Search
• Constraining Quadratic $f(R)$ Gravity from Astrophysical Observations of the Pulsar J0704+6620
• Emulators for Scarce and Noisy Data: Application to Auxiliary-Field Diffusion Monte Carlo for Neutron Matter
• Cold and dense perturbative QCD in a very strong magnetic background
• Stability and Observability of Magnetic Primordial Black Hole-Neutron Star Collisions
• Effect of dark matter interaction on hybrid star in the light of the recent astrophysical observations
• Properties of quark-matter cores in massive hybrid stars
• Fast neutrino cooling in the accreting neutron star MXB 1659-29
• Quarkyonic matter and quarkyonic stars in an extended RMF model
• Bayesian analysis of hybrid neutron star EOS constraints within an instantaneous nonlocal chiral quark matter model
• Polarized radiation from an accretion shock in accreting millisecond pulsars using exact Compton scattering formalism
• Universality in quasinormal modes of neutron stars with quark-hadron crossover
• Non-radial oscillations and gravitational wave emission of hybrid neutron stars
• Decoding rotating neutron stars: Role of the symmetry energy slope
• Postmerger multimessenger analysis of binary neutron stars: Effect of the magnetic field strength and topology
• Neutron star kicks plus rockets as a mechanism for forming wide low-eccentricity neutron star binaries
• Comprehensive Analysis of Constructing Hybrid Stars with an RG-consistent NJL Model
• Average speed of sound in neutron stars
• New interior model of neutron stars
• Rapidly spinning dark matter-admixed neutron stars
• Bayesian inferences on covariant density functionals from multimessenger astrophysical data: Nucleonic models
• Realizing the potential of deep neural network for analyzing neutron star observables and dense matter equation of state
• Quasi-universal relations in the context of future neutron star detections
• Hybrid stars may have an inverted structure
• Universal Relations For Generic Family Of Neutron Star Equations Of State
• On the initial spin period distribution of neutron stars
• Neutron Stars and Gravitational Waves: the Key Role of Nuclear Equation of State
• Pulse Profile Modelling of Thermonuclear Burst Oscillations II: Handling variability
• Asymptotically conformal CFL quark matter within a nonlocal chiral quark model
• Hyperonic uncertainties in neutron stars, mergers and supernovae
• Probe and Prejudice: Classification of compact objects and model comparison using EOS knowledge
• Influence of the nuclear symmetry energy slope on observables of compact stars with $\Delta$-admixed hypernuclear matter
• Exploring Fermionic Dark Matter Admixed Neutron Stars in the Light of Astrophysical Observations
• Deep learning inference of the neutron star equation of state
• (Anti)kaon condensation in strongly magnetized dense matter
• Towards constraining QCD phase transitions in neutron star interiors: Bayesian Inference with TOV linear response analysis
• Constraining Palatini gravity with GR-independent equations of state for neutron stars
• Neutron Skins: Weak Elastic Scattering and Neutron Stars
• PSR B0656+14: the unified outlook from the infrared to X-rays
• QCD equation of state and the structure of neutron stars in NJL model
• Standard cooling of rapidly rotating isolated neutron stars in 2D
• Spin-down induced quark-hadron phase transition in cold isolated neutron stars
• 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
• Effects from Dark Matter Halos on X-ray Pulsar Pulse Profiles
• Rotating Hybrid Stars with Color-Flavor-Locked Quark Matter
• Core structures of vortices in Ginzburg-Landau theory for neutron ${}^3{P}_2$ superfluids
• Unraveling the global behavior of equation of state by explicit finite nuclei constraints
• Exploring the nature of ultra-luminous X-ray sources across stellar population ages using detailed binary evolution calculations
• Spherically symmetric anisotropic strange stars
• Accreting neutron stars from the nuclear energy-density functional theory. II. Equation of state and global properties
• Exploring the Phase Diagram of V-QCD with Neutron Star Merger Simulations
• Inferring the Equation of State from Neutron Star Observables via Machine Learning
• Multi-Messenger and Cosmological Constraints on Dark Matter through Two-Fluid Neutron Star Modeling
• Fundamental physics with neutron stars
• Kaon condensation in skyrmion matter and compact stars
• Simultaneous description of high density QCD matter in heavy ion collisions and neutron star observations
• Massive neutron stars as mass gap candidates: Exploring equation of state and magnetic field
• Probing the impact of Delta-Baryons on Nuclear Matter and Non-Radial Oscillations in Neutron Stars
• Analyzing the dense matter equation of states in the light of the compact object HESS J1731-347
• Implications of Fermionic Dark Matter Interactions on Anisotropic Neutron Stars
• Femtoscopic study of the $\Lambda \alpha$ interaction
• Chandra and HST Studies of Six Millisecond Pulsars in the Globular Cluster M13
• Testing the Paradigm of Nuclear Many-Body Theory
• Influence of effective nucleon mass on equation of state for supernova simulations and neutron stars
• Investigating the role of nuclear parameters on oscillation modes in hot Neutron Stars
• Neutron stars in accreting systems -- signatures of the QCD phase transition
• Proximity effects of vortices in neutron ${}^3{P}_2$ superfluids in neutron stars: Vortex core transitions and covalent bonding of vortex molecules
• The Radius of PSR J0437-4715 from NICER Data
• $f$-mode oscillations of dark matter admixed quarkyonic neutron star
• Hadron-quark phase transition in neutron star by combining the relativistic Brueckner-Hartree-Fock theory and Dyson-Schwinger equation approach
• Impact of dark boson mediated feeble interaction between dark matter and hadronic matter on $f$-mode oscillation of neutron stars
• Measuring the vortex-nucleus pinning force from pulsar glitch rates
• Relativistic stellar modeling with perfect fluid core and anisotropic envelope fluid
• Formation of twin compact stars in low-mass X-ray binaries: Implications on eccentric and isolated millisecond pulsar populations
• A closer look at the Yukawa's interaction from a symmetry group perspective
• Nonparametric extensions of nuclear equations of state: probing the breakdown scale of relativistic mean-field theory
• Confining density functional approach for color superconducting quark matter and mesonic correlations
• Mass and tidal parameter extraction from gravitational waves of binary neutron stars mergers using deep learning
• Nuclear pasta in hot and dense matter and its influence on the equation of state for astrophysical simulations
• On the maximum compactness of neutron stars
• Neutron star cooling and mass distributions
• Thermal x-ray studies of neutron stars and the equation of state
• Neutron Stars in f(R)-Gravity and Its Extension with a Scalar Axion Field
• Neutron star mass formula with nuclear saturation parameters
• Thermodynamics of quark matter with multiquark clusters in an effective Beth-Uhlenbeck type approach
• Hyperons during proto-neutron star deleptonization and the emission of dark flavoured particles
• The Role of Strong Gravity and the Nuclear Equation of State on Neutron-Star Common-Envelope Accretion
• Revealing Dark Matter's Role in Neutron Stars Anisotropy: A Bayesian Approach Using Multi-messenger Observations
• Hydrogen-triggered X-ray Bursts from SAX J1808.4-3658? The Onset of Nuclear Burning
• Bayesian Quantification of Observability and Equation of State of Twin Stars
• Effect of Magnetic Fields on Urca Rates in Neutron Star Mergers
• On the nature of compact stars determined by gravitational waves, radio-astronomy, x-ray emission and nuclear physics
• Constraining neutron star radii in black hole-neutron star mergers from their electromagnetic counterparts
• Crustal failure as a tool to probe hybrid stars
• Anisotropic neutron star crust, solar system mountains, and gravitational waves
• Improved Analytic Love-C Relations for Neutron Stars
• Effects of dark boson mediated feeble interaction between dark matter (DM) and quark matter on $f$-mode oscillation of DM admixed quark stars
• Hyperons and $\Delta$'s in rotating protoneutron stars: Global properties
• Inferring three-nucleon couplings from multi-messenger neutron-star observations
• Correlation between the symmetry energy slope and the deconfinement phase transition
• Color superconductivity under neutron-star conditions at next-to-leading order
• Constraining the Surface Curvature of an Anisotropic Neutron Star
• Equation of state in neutron stars and supernovae
• Ensembles of unified crust and core equations of state in a nuclear-multimessenger astrophysics environment
• Universal relation involving fundamental modes in two-fluid dark matter admixed neutron stars
• Spectral analysis of the quiescent low-mass X-ray binary in the globular cluster M30
• Mass and radius of the most massive neutron star: The probe of the equation of state and perturbative QCD
• On the spin period distribution of millisecond pulsars
• Quarkyonic picture of isospin QCD
• Effects of finite sizes of atomic nuclei on shear modulus and torsional oscillations in neutron stars
• Exploring Waveform Variations among Neutron Star Ray-tracing Codes for Complex Emission Geometries
• Mechanical model of a boundary layer for the parallel tracks of kilohertz quasi-periodic oscillations in accreting neutron stars
• Accelerating Tests of General Relativity with Gravitational-Wave Signals using Hybrid Sampling
• Neutrino beaming in ultraluminous X-ray pulsars as a result of gravitational lensing by neutron stars
• Accuracy of one-dimensional approximation in neutron star quasi-normal modes
• Cooling of dark neutron stars
• Bayesian analysis of a relativistic hadronic model constrained by recent astrophysical observations
• Role of local anisotropy in hybrid stars
• Neutron-quark stars: Discerning viable alternatives for the higher-density part of the equation of state of compact stars
• Measuring Mass and Radius of the Maximum-mass Nonrotating Neutron Star
• The nuclear symmetry energy and the neutron skin thickness in nuclei
• Strange stars admixed with dark matter: equiparticle model in a two fluid approach
• Nonradial oscillations of stratified neutron stars with solid crusts: Mode characterization and tidal resonances in coalescing binaries
• Rotating Neutron Stars with the Relativistic Ab Initio Calculations
• Upper Limit of Sound Speed in Nuclear Matter: A Harmonious Interplay of Transport Calculation and Perturbative Quantum Chromodynamic Constraint
• Bayesian Analysis of the Neutron Star Equation of State and Model Comparison: Insights from PSR J0437+4715, PSR J0614+3329, and Other Multi-Physics Data
• Cooling of Isolated Neutron Stars with Pion Condensation: Possible Fast Cooling in a Low-Symmetry-Energy Model
• Tight bound on neutron-star radius with quasiperiodic oscillations in short gamma-ray bursts
• Astrophysics with the Laser Interferometer Space Antenna
• Towards a unified hadron-quark equation of state for neutron stars within the relativistic mean-field model
• Detecting Hyperons in neutron stars -- a machine learning approach
• Unraveling Trace Anomaly of Supradense Matter via Neutron Star Compactness Scaling
• Exploring $\Delta$-resonance in neutron stars: implications from astrophysical and nuclear observations
• Generating exact polytropes in non-conservative unimodular geometries
• General-relativistic resistive-magnetohydrodynamics simulations of self-consistent magnetized rotating neutron stars
• Non-radial oscillations of hadronic neutron stars, quark stars, and hybrid stars : Calculation of $f$, $p$, and $g$ mode frequencies
• Neutron star crustal properties from relativistic mean-field models and bulk parameters effects
• Crust (Unified) Tool for Equation-of-state Reconstruction (CUTER) v2
• Strongly pulsed thermal X-rays from a single extended hot spot on PSR J2021+4026
• From Nuclear to Unnuclear Physics
• Insights Into Neutron Stars From Gravitational Redshifts and Universal Relations
• Observational Probes of the Neutron Star Equation of State with Hyperons, Bosonic Dark Matter, and Quark Matter
• Neutron and quark stars: constraining the parameters for simple EoS using the GW170817
• A double dipole geometry for PSR~J0740+6620
• Neutron star equation of state: identifying hadronic matter characteristics
• Hybrid stars and QCD phase transition with a NJL-like model
• Bayesian inference of neutron star crust properties using an ab initio-benchmarked meta-model
• Fundamental Oscillation Modes in Neutron Stars with Hyperons and Delta Baryons
• Effects of inner crusts on $g$-mode oscillations in neutron stars
• Investigating the role of nuclear parameters in Neutron Star oscillations: a model comparison
• Speed of sound peak in isospin QCD: a natural prediction of the Medium Separation Scheme
• Non-Radial Oscillation Modes in Hybrid Stars with Hyperons and Delta Baryons
• Direct nonparametric multimessenger constraints on the equation of state of cold dense nuclear matter
• Maximum mass of hybrid star formed via shock induced phase transition in cold neutron stars
• Strange quark stars: the role of excluded volume effects
• Investigating the Impact of Higher-Order Phase Transitions in Binary Neutron-Star Mergers
• Neutron stars and the cosmological constant problem
• Density-dependent quark mean-field model for nuclear matter and neutron stars
• The nucleardatapy toolkit for simple access to experimental nuclear data, astrophysical observations, and theoretical predictions
• Equation-of-state-informed pulse profile modeling
• Properties of Rotating Neutron Star in Density-dependent Relativistic Mean-field Models
• The equation of state of neutron stars and the role of nuclear experiments
• Cluster Structures with Machine Learning Support in Neutron Star M-R relations
• Dark Matter Influence on Quarkyonic Stars: A Relativistic Mean Field Analysis
• From masses and radii of neutron stars to EOS of nuclear matter through neural network
• Oscillating Magnetized Color Superconducting Quark Stars
• Fundamental-mode eigenfrequencies of neutral and charged twin neutron stars
• Neutron star equation of state and tidal deformability with nuclear energy density functionals
• I-Love-Q in Hořava-Lifshitz Gravity
• Influence of dark matter on the structure of strange quark stars in one-fluid model
• Equation of state and neutrino transfer in supernovae and neutron stars
• Influence of Dark Matter on the Magnetized Neutron Star
• Spheroidal force-free neutron star magnetospheres
• Effects of nucleon-nucleon short-range correlation and symmetry energy on the evolution of newly born magnetars
• Neutron star phase transition as the origin for the fast radio bursts and soft gamma-ray repeaters of SGR J1935+2154
• Model-Independent Determination of the Tidal Deformability of a 1.4 $M_{\odot }$ Neutron Star from Gravitational-Wave Measurements
• Dark energy effects on realistic neutron stars
• Constraint on the equation of state of strange quark star: Perturbative QCD along with a density-dependent bag constant
• Equation of State Independent Determination on the Radius of a 1.4 $M_{\odot }$ Neutron Star Using Mass-Radius Measurements
• Subtleties in constraining gravity theories with mass-radius data
• On the minimum spin period of accreting pulsars
• The Bulk Properties of Isolated Neutron Stars Inferred from the Gravitational Redshift Measurements
• Conformality and percolation threshold in neutron stars
• Phase transition and stiffer core fluid in neutron stars: Effects on stellar configurations, dynamical stability, and tidal deformability
• Effect of Dark matter and $\sigma$-cut potential on radial and non-radial oscillation modes in neutron stars
• Radiation Driven Warping of Accretion Discs Due to X-ray Bursts
• Probing into the Possible Range of the U Bosonic Coupling Constants in Neutron Stars Containing Hyperons
• Modeling photometric variations due to a global inhomogeneity on an obliquely rotating star: application to lightcurves of white dwarfs
• New modeling for hybrid stars with an elastic quark core
• Unveiling a universal relationship between the f(R) parameter and neutron star properties
• Population synthesis and parameter estimation of neutron stars with continuous gravitational waves and third-generation detectors
• New Insights into Supradense Matter from Dissecting Scaled Stellar Structure Equations
• Recent astrophysical observations reproduced by a short-range correlated van der Waals-type model?
• Confronting recent light compact star observations with color-flavor locked quark matter
• Fastest spinning millisecond pulsars: indicators for quark matter in neutron stars?
• Deciphering Accretion-Driven Starquakes in Recycled Millisecond Pulsars using Gravitational Waves
• Pair production in the millisecond pulsar J0030+0451
• Strongly interacting matter in extreme magnetic fields
• Dark matter effects in modified teleparallel gravity
• Nucleon Short-Range Correlations and High-Momentum Dynamics: Implications on the Equation of State of Dense Matter
• Love-C relations for elastic hybrid stars
• I-C-Q relations for rapidly rotating stable hybrid stars
• Revisiting thermoelectric effects in the crust of neutron stars
• Impact of dark matter on strange quark stars described by different quark models
• Study of hybrid stars with nonstrange quark matter cores
• Nuclear physics inputs for dense-matter modelling in neutron stars. The nuclear equation of state
• Impact of $\Xi$-Hypernuclear Constraints on Relativistic Equation of State and Properties of Hyperon Stars
• Matching slowly rotating spacetimes split by dynamic thin shells
• Gravitational wave asteroseismology of accreting neutron stars in a steady state
• Exploring Radial Oscillations in Slow Stable and Hybrid Neutron Stars
• Structural properties of charged compact stars with color-flavour-locked quarks matter
• Comparing strange and non-strange quark stars within resummed QCD at NLO
• Isospin asymmetry and neutron stars in V-QCD
• Effects of Landau quantization on neutrino emission and absorption
• Axion effects on quark matter and quark-matter cores in massive hybrid stars
• Dependence of postmerger properties on the thermal heating efficiency in neutron star mergers
• Oscillatory properties of strange quark stars described by the vector MIT bag model
• A holographic study on QCD phase transition and neutron star properties
• Tests of Classical Gravity with Radio Pulsars
• Novel features of asymmetric nuclear matter from terrestrial experiments and astrophysical observations of neutron stars
• $f$-mode oscillations in hot Neutron Stars: Effect of hyperons and neutrino trapping
• Impact of the relativistic Cowling approximation on shear and interface modes of neutron stars
• Effective Field Theories for Neutron Stars Physics
• Quark stars in $D_3$-$D_7$ holographic model
• Spacetime Curvature as a Probe of Exotic Core Phases in Neutron Stars within Modified Gravity
• Dense Hadronic Matter in Neutron Stars
• Properties of the Object HESS J1731-347 as a Twin Compact Star
• $f$ and $p$ mode oscillation of proto-neutron stars with systematic variation of the nucleon effective mass
• Effects of Dark Matter on the Spontaneous Scalarization in Neutron Stars
• Compact stellar model in higher torsion gravitational theory
• Hyperons in Neutron Stars across the observed mass range: Insights from realistic $\Lambda$-N and $\Lambda$-$\Lambda$ interactions within a Microscopic Framework
• Axion-Like Particle Mediated Dark Matter and Neutron Star Properties in the QHD Model
• Quark confinement in an equiparticle quark model: application to stellar matter
• Magnetically Threaded Thin Disks in the Presence of the Quadrupole Magnetic Field
• Microscopic constraints for the equation of state and structure of neutron stars: a Bayesian model mixing framework
• Optimal collision-energy range for realizing macroscopic high-baryon-density matter
• Nuclear mass table in density functional approach inspired by neutron-star observations
• Neutron Star with Dark Matter Admixture: A Candidate for Bridging the Mass Gap
• Neutron Star Radii from Laboratory Experiments
• Thermodynamics of strongly magnetized dense quark matter from hard dense loop perturbation theory
• Hadron-quark phase transition in the neutron star with vector MIT bag model and Korea-IBS-Daegu-SKKU functional
• Gravitational-Wave Constraints on Neutron-Star Pressure Anisotropy via Universal Relations
• Bayesian inference favors quark matter in neutron star interiors
• The Kohn-Luttinger Effect in Dense Matter and its Implications for Neutron Stars
• New solution to the hyperon puzzle of neutron stars: Quantum many-body effects
• Multi-wavelength emission modelling of PSR~J0437$-$4715
• Scaling relations for the uncertainty in neutron star radius inferred from pulse profile modelling: the effect of spin rate
• Hybrid stars from a constrained equation of state
• Joint Inference of Population, Cosmology, and Neutron Star Equation of State from Gravitational Waves of Dark Binary Neutron Stars
• Rotating Neutron Stars with Dark Matter Halos
• Gravitational Redshift for Rapidly Rotating Neutron Stars
• On the Cooling of Compact Stars in Light of the HESS J1731-347 Remnant
• Hot and highly magnetized neutron star matter properties with Skyrme interactions
• Pioneering High-Speed Pulsar Parameter Estimation Using Convolutional Neural Networks
• Parameter constraints for accreting millisecond pulsars with synthetic NICER data
• How Neutron Star Observations Point Towards Exotic Matter: Existing Explanations and a Prospective Proposal
• Modification of the universal relation between mass, radius and nonradial $f$-mode oscillation in proto-neutron stars
• Early deconfinement of asymptotically conformal color-superconducting quark matter in neutron stars
• Impact of Accretion Assumptions on Pulse Profile Modelling of Superburst Oscillations in 4U 1636-536
• Rapid Hierarchical Inference of Neutron Star Equation of State from multiple Gravitational Wave Observations of Binary Neutron Star Coalescences
• Consistent crust-core interpolation and its effect on non-radial neutron star oscillations
• Finite-temperature equation of state with hyperons
• Density dependent speed of sound and its consequences in neutron stars
• Properties and microscopic structures of dense stellar matter in RMF models
• Inner crust equations of state for CompOSE
• Can Neutron Star Tidal Effects Obscure Deviations from General Relativity?
• Anisotropic pressure effect on central EOS of PSR J0740+6620 in the light of dimensionless TOV equation
• Probing small neutron skin variations in isotope pairs by hyperon-antihyperon production in antiproton--nucleus interactions
• Star Log-extended eMulation: a method for efficient computation of the Tolman-Oppenheimer-Volkoff equations
• Equation of State of Decompressed Quark Matter, and Observational Signatures of Quark-Star Mergers
• A post-Newtonian approach to neutron star oscillations
• Universal relations between the quasinormal modes of neutron stars and magnetic tidal deformability
• Rapidly Spinning Massive Pulsars as an Indicator of Quark Deconfinement
• Antineutrino Opacity in Neutron Stars in the Models Constrained by Recent Terrestrial Experiments and Astrophysical Observations
• Astrophysical constraints on the cold equation of state of the strongly interacting matter
• The mixed phase quark core in massive hybrid stars
• Projecting the likely importance of weak-interaction-driven bulk viscosity in neutron star mergers
• El-CID: A filter for Gravitational-wave Electromagnetic Counterpart Identification
• Dipole Polarizability of Finite Nuclei as a Probe of Neutron Stars
• Can a hybrid star with constant sound speed parametrization explain the new NICER mass-radius measurements ?
• General gravitational properties of neutron stars: curvature invariants, binding energy, and trace anomaly
• Neutron Stars in Causal Scalar-Tensor Theories
• Heavy Neutron Star Phenomenology with an H-dibaryon
• Convection signatures in early-time gravitational waves from core-collapse supernovae
• Impact of hyperons on structural properties of neutron stars and hybrid stars within the regularized four-dimensional Einstein-Gauss-Bonnet gravity
• A Counterintuitive Correlation Between Neutron-Star Radii Inferred from Pulse Modeling and Surface Emission Beaming
• The spin-orbit alignment hypothesis in millisecond pulsars
• Probing of EoS with clusters and hypernuclei
• The time evolution of light nuclei cumulants and ratios with a first-order phase transition in the UrQMD transport model
• Astrophysical constraints on neutron star $f$-modes with a nonparametric equation of state representation
• Rotating neutron stars with chaotic magnetic fields in general relativity and Rastall gravity
• Probing ALP-photon couplings in Neutron Stars: Scalar versus pseudoscalar cases
• Constraining the competition between the deconfinement and chiral phase transitions in light of the multimessenger era
• Limitations in constraining neutron star radii and nuclear properties from inspiral gravitational wave detections
• New ab initio constrained extended Skyrme equations of state for simulations of neutron stars, supernovae and binary mergers: II. Thermal response in the suprasaturation density domain
• Radio polarization of millisecond pulsars with multipolar magnetic fields
• Shapiro Delay Measurements from Fifteen Years of PSR J1231$-$1411 Radio Observations
• Pulse profile modelling of the accretion-powered millisecond pulsar SAX J1808.4-3658 using NICER data from its 2019 and 2022 outbursts
• Are NICER and GW170817 constraints suggesting a compactified scenario for Neutron stars?
• Mass-Radius Constraints for 2S 0918-549 from an RXTE Superexpansion Burst: A Direct Cooling-Tail Analysis
• Characterizing the quark-hadron mixed phase in compact star cores : sensitivity to nuclear saturation and quark-model parameters at finite-temperature
• Systematic study of the morphology and length of slow stable hybrid star branches
• Estimation of neutron star mass and radius of FRB 20240114A by identification of crustal oscillations
• Is The Trace Anomaly at its Minimum Value at Neutron Star Centers?
• The sharpness of the quark-hadron transition and the properties of hybrid stars
• X-ray pulsed light curves of highly compact neutron stars as probes of scalar-tensor theories of gravity
• Neutron stars as extreme gravity probes
• Measuring Hubble Constant with Dark Neutron Star-Black Hole Mergers
• Hyperonic equation of state at finite temperature for neutron stars
• Landau parameters and entrainment matrix of cold stellar matter: effect of the symmetry energy and strong magnetic fields
• Equation of state for hot hyperonic neutron star matter
• Chiral Effective Field Theory's Impact on Advancing Quantum Monte Carlo Methods
• Effects of a Brueckner-Hartree-Fock-corrected effective mass on speed of sound, conformality, and observables of dark matter-admixed neutron stars
• Heavy-ion collision simulation with high performance computer
• Bayesian Inference of fine-features of dense matter EOS from future high-precision data of neutron star radii
• The $g$-mode frequencies in cold neutron stars and nuclear saturation parameters
• Universality of dual mass-scaled fundamental modes in two-fluid neutron stars with mirror dark matter
• Slowly rotating condensate dark stars beyond the mean-field approximation
• Structure of Anisotropic Magnetized Neutron Stars in f(R,T) Gravity with Realistic Equation of State
• Radial oscillations of quark stars in light of current astrophysical constraints: A comparative study
• Nonradial oscillations of realistic anisotropic neutron stars: Axial modes
• Multiwavelength Analysis of PSR J0437-4715 with Pulse Profile Modeling
• Nonlinear electrodynamics in magnetars: systematic effects on radius constraints and timing analysis
• Neutron star atmospheres composed of fusion ashes
• Isentropic hybrid stars in the Nambu-Jona-Lasinio model: effects of neutrino trapping
• Probing neutron stars with the full pre-merger and post-merger gravitational wave signal from binary coalescences
• Constraining the Phase-Transition EoS using the Energy Dependence of Directed Flow
• Constraining the parameterized neutron star equation of state with astronomical observations
• Effects of isoscalar- and isovector-scalar meson mixing on neutron star structure
• Realistic Equations of State Informing Neutron Star Post-Merger Gravitational-Wave Frequencies
• Bayesian Inference of Neutron Star Properties in $f(Q)$ Gravity Using NICER Observations
• Impact of crust-core connection procedures on the tidal deformability of neutron stars
• Bayesian Constraints on the Neutron Star Equation of State with a Smooth Hadron-Quark Crossover
• Asymptotic Freedom and Vacuum Polarization Determine the Astrophysical End State of Relativistic Gravitational Collapse: Quark--Gluon Plasma Star Instead of Black Hole
• Constraining Hamiltonians from chiral effective field theory with neutron-star data
• Universal relation between dipole polarizability of finite nuclei and neutron-star compactness
• Equation-of-State Independent Relations in Rapidly Rotating Hybrid Stars
• Universal Relations for the Increase in the Mass and Radius of a Rotating Neutron Star
• Unified nonparametric equation-of-state inference from the neutron-star crust to perturbative-QCD densities
• Effects of three-baryon forces on kaon condensation in hyperon-mixed matter
• Cosmology with Love: Measuring the Hubble constant using neutron star universal relations
• Neutron Star Equation of State with Nucleon Short-Range Correlations: A Concise Review and Open Issues
• Bayesian inferences on covariant density functionals from multimessenger astrophysical data: Influences of parametrizations of density dependent couplings
• Tidal Deformability of Quark Stars with Repulsive Interactions
• Impact of Anisotropy on Neutron Star Structure and Curvature
• On the Destabilization of High-Mass Neutron Stars by the Emergence of $d^{\ast }$-Hexaquarks
• Systematic bias due to eccentricity in parameter estimation for merging binary neutron stars : Spinning case
• Renormalization-Group Invariant Parity-Doublet Model for Nuclear and Neutron-Star Matter
• Fully general relativistic description of rapidly-rotating axially-symmetric neutron stars for constraining nuclear matter equations of state
• Scalarized Hybrid Neutron Stars in Scalar Tensor Gravity
• The nuclear matter density functional under the nucleonic hypothesis
• Toward a Unified Understanding of the Dense Matter Equation of State
• Tracing the Trace Anomaly of Dense Matter inside Neutron Stars
• Heavy baryons in hot stellar matter with light nuclei and hypernuclei
• Quasi-stationary sequences of hyper massive neutron stars with exotic equations of state
• Accuracy and Applicability of the Hartle-Thorne and Komatsu-Eriguchi-Hachisu Methods for Modeling Rotating Neutron Stars
• Effects of short-range correlations at high densities on neutron stars with and without DM content: role of the repulsive self-interaction
• Structural Properties of Magnetized Neutron Stars under f (R, T ) Gravity Framework
• P-stars in the gravitational wave era
• Properties of H particle-admixed compact star
• Classification of $g$-modes for neutron stars with a strong transition: Novel universal relation including slow stable hybrid stars
• Binding energy of compact stars and their non-radial oscillations
• Three-dimensional equation of state extension of quark matter in Fermi-liquid theory
• Recurring region for neutron-star observables
• Parity-doubled nucleons can rapidly cool neutron stars
• Mass-radius relation, moment of inertia, and tidal love numbers of anisotropic neutron stars in f (R,T) gravity
• Macroscopic approaches to rotating neutron stars
• Learning about neutron star composition from the slope of the mass-radius diagram
• Density functional approach to quark matter with confinement and color superconductivity
• Finite density nuclear matter and neutron stars in hard-wall AdS/QCD model
• Examining the possibility of a thick crust in the compact stellar object HESS J1731-347
• Inferring the nuclear symmetry energy at supra saturation density from neutrino cooling
• Hybrid stars with large strange quark cores
• The Cohesive Object Sequence: The Mass-Density Distribution of Astronomical Objects from Asteroids to Stars
• What are neutron stars made of? Gravitational waves may reveal the answer