Constraining compact star properties with nuclear saturation parameters

Abstract

A set of hadronic equations of state (EoSs) derived from relativistic density functional theory and constrained by terrestrial experiments, astrophysical observations, in particular by the GW170817 event, and chiral effective field theory ($\chi$EFT) of neutron matter is used to explore the sensitivity of the EoS parameterization on the few nuclear matter characteristics defined at the saturation density. We find that the gross properties of compact stars are most sensitive to the isoscalar skewness coefficient $Q_{\text{sat}}$ and the isovector slope coefficient $L_{\text{sym}}$ around saturation density, since the higher order coefficients, such as $K_{\text{sym}}$, are fixed by our model. More specifically, (i) among these $Q_{\text{sat}}$ is the dominant parameter controlling both the maximum mass and the radii of compact stars while $L_{\mathrm{sym}}$ is constrained somewhat by $\chi$EFT of neutron matter; (ii) massive enough ($M\sim 2.0M_{\odot })$ compact stars featuring both hyperons and $\Delta$ resonances can be obtained if the value of $Q_{\text{sat}}$ is large enough; (iii) the emergence of $\Delta$'s reduces the radius of a canonical mass ($M\sim 1.4M_{\odot })$ compact star thus easing the tension between the predictions of the relativistic density functionals and the inferences from the X-ray observation of nearby isolated neutron stars.

13 pages, 11 figures, 3 tables. Discussions and references added. Phys. Rev. C in press

References in corpus (31)

• 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
• Relativistic Continuum Hartree Bogoliubov Theory for Ground State Properties of Exotic Nuclei
• Constraining the Maximum Mass of Neutron Stars From Multi-Messenger Observations of GW170817
• Nuclear symmetry energy probed by neutron skin thickness of nuclei
• Relativistic Nuclear Energy Density Functionals: adjusting parameters to binding energies
• Relativistic Mean-Field Hadronic Models under Nuclear Matter Constraints
• Modeling GW170817 based on numerical relativity and its implications
• Neutron skin of 208Pb, nuclear symmetry energy, and the parity radius experiment
• Constraints on the high-density nuclear equation of state from the phenomenology of compact stars and heavy-ion collisions
• Electromagnetic excitation of the Delta(1232)-resonance
• The Giant Dipole Resonance as a quantitative constraint on the symmetry energy
• Core-crust transition in neutron stars: predictivity of density developments
• Shell Structure and $\rho$-Tensor Correlations in Density-Dependent Relativistic Hartree-Fock theory
• Relativistic model for nuclear matter and atomic nuclei with momentum-dependent self-energies
• Compact stars with sequential QCD phase transitions
• Giant Quadrupole Resonances in 208Pb, the nuclear symmetry energy and the neutron skin thickness
• Neutron matter from chiral two- and three-nucleon calculations up to N${}^3$LO
• Constraining the High-Density Behavior of Nuclear Symmetry Energy with the Tidal Polarizability of Neutron Stars
• Equation of State for Nucleonic and Hyperonic Neutron Stars with Mass and Radius Constraints
• Constraining hypernuclear density functional with $\Lambda$-hypernuclei and compact stars
• Critical Density and Impact of $\Delta (1232)$ Resonance Formation in Neutron Stars
• Implications from GW170817 for $\Delta$-isobar admixed hypernuclear compact stars
• Isovector properties of the Gogny interaction
• Neutron stars with small radii -- the role of delta resonances
• $\Delta$ (1232) effects in density-dependent relativistic Hartree-Fock theory and neutron stars
• Constraining the density slope of nuclear symmetry energy at subsaturation densities using electric dipole polarizability in ${}^{208}$Pb
• EoS constraints from nuclear masses and radii in a meta-modeling approach
• Neutron star mass limit at $2M_{\odot }$ supports the existence of a CEP
• Density Functional approach for multi-strange hypernuclei: competition between $\Lambda$ and ${\Xi }^{0,-}$ hyperons

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• Ultracompact hybrid stars consistent with multimessenger astrophysics
• Baryonic models of ultra-low-mass compact stars for the central compact object in HESS J1731-347
• Exploring universal characteristics of neutron star matter with relativistic \textit{ab initio} equations of state
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• Bayesian constraints on covariant density functional equations of state of compact stars with new NICER mass-radius measurements
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• Exploring $\Delta$-resonance in neutron stars: implications from astrophysical and nuclear observations
• Properties of Rotating Neutron Star in Density-dependent Relativistic Mean-field Models
• Exploring nuclear force with pulsar glitch observation
• Delayed Thermal Relaxation of Rapidly Cooling Neutron Stars: Nucleon Superfluidity and Non-nucleon Particles
• Simulating Binary Neutron Star Mergers with Finite-temperature Equations of State: The influences of the slope of the symmetry energy and artificial heating
• Bayesian inferences on covariant density functionals from multimessenger astrophysical data: Influences of parametrizations of density dependent couplings