Moments of inertia of neutron stars in relativistic mean field theory: the role of the isovector scalar channel

Abstract

With the inclusion of the isovector scalar channel in the meson-nucleon couplings, taking DD-ME$\delta$ as an effective interaction, the moments of inertia of neutron stars possessing various stellar masses are studied within the density dependent relativistic mean field (RMF) theory. The isovector scalar channel contributes to the softening of the neutron-star matter equation of state (EOS) and therefore the reduction of the maximum mass and radius of neutron stars. Smaller values of the total moment of inertia $I$ and the crustal moment of inertia $\Delta I$ are then obtained in DD-ME$\delta$ via numerical procedure in comparison with those in other selected RMF functionals. In addition, the involvement of the isovector scalar channel lowers the thickness of the neutron star crust and its mass fraction as well. The sensitivity to both the crustal mass and stellar radius causes the crustal moment of inertia to be more obviously reduced than the total one, eventually leading to a suppression on the fraction of crustal moment of inertia $\Delta I/I$ in DD-ME$\delta$. The results indicate the crustal moment of inertia as a more sensitive probe of the neutron-star matter EOS than the total one, and demonstrate that the isovector scalar meson-nucleon couplings in the RMF theory could exert influence over the physics of pulsar glitches.

arXiv comment7 pages, 5 figures, 1 table, to be published in SCIENCE CHINA Physics, Mechanics & Astronomy

References in corpus (57)

• The Physics of Neutron Stars
• Neutron Star Observations: Prognosis for Equation of State Constraints
• Relativistic Continuum Hartree Bogoliubov Theory for Ground State Properties of Exotic Nuclei
• A Double-Pulsar System - A Rare Laboratory for Relativistic Gravity and Plasma Physics
• The Five-Hundred-Meter Aperture Spherical Radio Telescope (FAST) Project
• New parametrization for the nuclear covariant energy density functional with point-coupling interaction
• A study of 315 glitches in the rotation of 102 pulsars
• Constraining the Symmetry Parameters of the Nuclear Interaction
• I-Love-Q
• New effective interactions in RMF theory with non-linear terms and density-dependent meson-nucleon coupling
• Constraining the Equation of State with Moment of Inertia Measurements
• Pulsar Constraints on Neutron Star Structure and Equation of State
• Hidden pseudospin and spin symmetries and their origins in atomic nuclei
• Asymmetric nuclear matter:the role of the isovector scalar channel
• Pulsar glitches: The crust is not enough
• Density dependent hadron field theory for asymmetric nuclear matter and exotic nuclei
• The neutron radii of Lead and neutron stars
• Nuclear constraints on properties of neutron star crusts
• Multi chiral-doublets in one single nucleus
• Spin symmetry in the anti-nucleon spectrum
• Core-crust transition in neutron stars: predictivity of density developments
• Halos in medium-heavy and heavy nuclei with covariant density functional theory in continuum
• On the Lorentz structure of the symmetry energy
• Crustal Entrainment and Pulsar Glitches
• Effects of momentum-dependent symmetry potential on heavy-ion collisions induced by neutron-rich nuclei
• Relativistic mean field interaction with density dependent meson-nucleon vertices based on microscopical calculations
• Nuclear Matter in Relativistic Mean Field Theory with Isovector Scalar Meson
• Pulsars as Astrophysical Laboratories for Nuclear and Particle Physics
• Spin-isospin resonances: A self-consistent covariant description
• Isospin-dependent clusterization of Neutron-Star Matter
• Asymmetric Nuclear Matter in the Relativistic Brueckner Hartree Fock approach
• Pulsar Glitches: The Crust may be Enough
• The Five-hundred-meter Aperture Spherical Radio Telescope (FAST) Project
• Application of the density dependent hadron field theory to neutron star matter
• The nuclear symmetry energy and stability of matter in neutron star
• Sensitivity of the Moment of Inertia of Neutron Stars to the Equation of State of Neutron-Rich Matter
• Neutron star properties in density-dependent relativistic Hartree-Fock theory
• Superfluid Density of Neutrons in the Inner Crust of Neutron Stars: New Life for Pulsar Glitch Models
• Pseudo-spin symmetry in density-dependent relativistic Hartree-Fock theory
• Hyperon effects in covariant density functional theory with recent astrophysical observations
• Accurate calibration of relativistic mean-field models: correlating observables and providing meaningful theoretical uncertainties
• Density dependencies of interaction strengths and their influence on nuclear matter and neutron star in relativistic mean field theory
• Imprint of the symmetry energy on the inner crust and strangeness content of neutron stars
• The Nuclear Tensor Interaction in Covariant Energy Density Functional
• Giant Pulsar Glitches and the Inertia of Neutron-Star Crusts
• Neutron stars with isovector scalar correlations
• Structures of the Vela pulsar and the glitch crisis from the Brueckner theory
• Nuclear fourth-order symmetry energy and its effects on neutron star properties in the relativistic Hartree-Fock theory
• Relativistic description of BCS-BEC crossover in nuclear matter
• Descriptions of Carbon isotopes within relativistic Hartree-Fock-Bogoliubov theory
• Isospin coupling-channel decomposition of nuclear symmetry energy in covariant density functional theory
• Relativistic interpretation on the nature of nuclear tensor force
• BCS-BEC crossover in nuclear matter with the relativistic Hartree-Bogoliubov theory
• Application of density dependent parametrization models to asymmetric nuclear matter
• Stability of the $\beta$-equilibrated dense matter and core-crust transition in neutron stars
• Configuration mixing in low-lying spectra of carbon hypernuclei
• A key factor to the spin parameter of uniformly rotating compact stars: crust structure

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