The radius of a typical-mass neutron star and chiral effective field theory

Abstract

We calculate neutron star masses and radii from equations of state based on recent high-quality chiral nucleon-nucleon potentials up to fifth order of the chiral expansion and the leading chiral three- nucleon force. Our focus is on the radius of a 1.4 M_{Sun} neutron star, for which we report predictions that are consistent with the most recent constraints. We also show the full M(R) relations up to their respective maximum masses. Beyond the densities for which microscopic predictions are derived from chiral forces, the equations of state are obtained via polytropic continuations. However, the radius of a 1.4 M_{Sun} neutron star is nearly insensitive to the high-density extrapolation.

arXiv comment8 pages, 4 figures

References in corpus (74)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• A Massive Pulsar in a Compact Relativistic Binary
• An accurate nucleon-nucleon potential with charge-independence breaking
• Modern Theory of Nuclear Forces
• Neutron Star Structure and the Equation of State
• Chiral effective field theory and nuclear forces
• Accurate Charge-Dependent Nucleon-Nucleon Potential at Fourth Order of Chiral Perturbation Theory
• The Physics of Neutron Stars
• Neutron Star Observations: Prognosis for Equation of State Constraints
• Masses, Radii, and Equation of State of Neutron Stars
• Gravitational-wave constraints on the neutron-star-matter Equation of State
• Constraints on a phenomenologically parameterized neutron-star equation of state
• Quantum Monte Carlo methods for nuclear physics
• Equation of state and neutron star properties constrained by nuclear physics and observation
• The two-nucleon system at next-to-next-to-next-to-leading order
• Three-Nucleon Forces from Chiral Effective Field Theory
• The Equation of State of Hot, Dense Matter and Neutron Stars
• Improved nuclear matter calculations from chiral low-momentum interactions
• Coupled-cluster computations of atomic nuclei
• The In-Medium Similarity Renormalization Group: A Novel Ab Initio Method for Nuclei
• The Neutron Star Mass-Radius Relation and the Equation of State of Dense Matter
• Chiral three-nucleon forces and neutron matter
• Constraints on neutron star radii based on chiral effective field theory interactions
• Precision nucleon-nucleon potential at fifth order in the chiral expansion
• Charge, neutron, and weak size of the atomic nucleus
• High-quality two-nucleon potentials up to fifth order of the chiral expansion
• Quantum Monte Carlo Calculations with Chiral Effective Field Theory Interactions
• Evolution of shell structure in neutron-rich calcium isotopes
• Roy-Steiner-equation analysis of pion-nucleon scattering
• Structure of the lightest tin isotopes
• Nuclear forces and their impact on neutron-rich nuclei and neutron-rich matter
• Continuum effects and three-nucleon forces in neutron-rich oxygen isotopes
• Matching pion-nucleon Roy-Steiner equations to chiral perturbation theory
• Unified ab initio approaches to nuclear structure and reactions
• Saturation with chiral interactions and consequences for finite nuclei
• Coupled-cluster calculations of nucleonic matter
• Electric dipole polarizability of ${}^{48}$Ca and implications for the neutron skin
• Neutron star tidal deformabilities constrained by nuclear theory and experiment
• Signatures of three-nucleon interactions in few-nucleon systems
• In-Medium Similarity Renormalization Group with Chiral Two- Plus Three-Nucleon Interactions
• Leading chiral three-nucleon forces along isotope chains in the calcium region
• Quantum Monte Carlo calculations of neutron matter with chiral three-body forces
• Unified equation of state for neutron stars on a microscopic basis
• Density-dependent effective nucleon-nucleon interaction from chiral three-nucleon forces
• Chiral three-nucleon force at N^4LO I: Longest-range contributions
• Neutron matter from chiral two- and three-nucleon calculations up to N${}^3$LO
• The nuclear matter equation of state with consistent two- and three-body perturbative chiral interactions
• Surface Emission from Neutron Stars and Implications for the Physics of their Interiors
• Equation of state of nuclear and neutron matter at third-order in perturbation theory from chiral EFT
• Reduced regulator dependence of neutron-matter predictions with chiral interactions
• Chiral effective field theory predictions for muon capture on deuteron and 3He
• Towards order-by-order calculations of the nuclear and neutron matter equations of state in chiral effective field theory
• Ab initio many-body calculations of nucleon scattering on 4He, 7Li, 7Be, 12C and 16O
• Equation of state of dense nuclear matter and neutron star structure from nuclear chiral interactions
• Effective shell-model hamiltonians from realistic nucleon-nucleon potentials within a perturbative approach
• Optical potential from first principles
• Thermodynamics of isospin-asymmetric nuclear matter from chiral effective field theory
• Nuclear thermodynamics from chiral low-momentum interactions
• Chiral three-nucleon interaction and the carbon-14 dating beta decay
• Effect of three-nucleon interaction in p-3He elastic scattering
• Nonperturbative renormalization of the chiral nucleon-nucleon interaction up to next-to-next-to-leading order
• Coupled-cluster studies of infinite nuclear matter
• Low Momentum Nucleon-Nucleon Interactions and Shell-Model Calculations
• Low-energy neutron-deuteron reactions with N3LO chiral forces
• Effects of Chiral Effective Field Theory Equation of State on Binary Neutron Star Mergers
• Shell-model calculations for neutron-rich carbon isotopes with a chiral nucleon-nucleon potential
• Microscopic optical potential for exotic isotopes from chiral effective field theory
• Static Response of Neutron Matter
• Chiral effective field theory calculations of neutrino processes in dense matter
• Symmetry energy, neutron skin, and neutron star radius from chiral effective field theory interactions
• Charged-current reactions in the supernova neutrino-sphere
• Supernova matter at subnuclear densities as a resonant Fermi gas: Enhancement of neutrino rates
• Microscopically constrained mean field models from chiral nuclear thermodynamics
• Short-range correlations in isospin symmetric and asymmetric nuclear matter: a microscopic perspective

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• nEoS: Neutron Star Equation of State from hadron physics alone
• Hadron matter in neutron stars in view of gravitational wave observations
• Analysis of the neutron matter equation of state and the symmetry energy up to fourth order of chiral effective field theory
• Detailed X-ray spectroscopy of the magnetar 1E 2259+586
• 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
• Constraining Palatini gravity with GR-independent equations of state for neutron stars