Hyperon and nuclear symmetry energy in the neutron star

Abstract

In this work, masses and radii of neutron stars are considered to investigate the effect of nuclear symmetry energy to the astrophysical observables. A relativistic mean field model with density-dependent meson-baryon coupling constants is employed in describing the equation of state of dense nuclear matter, and the density dependencies of the symmetry energies are quoted from the recent phenomenological formulae obtained from the heavy ion data at subnuclear saturation densities. Since hyperons can take part in the $\beta$-equilibrium of the dense matter inside neutron stars, we include hyperons in our estimation and their roles are discussed in combination with that of the nuclear symmetry energy.

17 pages, 5 figures, to be published in Physical Review C

References in corpus (7)

• Shapiro delay measurement of a two solar mass neutron star
• Neutron Star Observations: Prognosis for Equation of State Constraints
• Neutron-Rich Nuclei in Heaven and Earth
• Nuclear symmetry energy probed by neutron skin thickness of nuclei
• Why is Tin so soft?
• Isospin- and momentum-dependent effective interactions for the baryon octet and the properties of hybrid stars
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Cited by in corpus (9)

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• Constraining hypernuclear density functional with $\Lambda$-hypernuclei and compact stars
• Massive $\Delta$-resonance admixed hypernuclear stars with anti-kaon condensations
• Nuclear isospin asymmetry in $\alpha$ decays of heavy nuclei
• Kaon Condensation in Neutron Stars with Skyrme-Hartree-Fock Models
• Anisotropic pressure and hyperons in neutron stars
• Neutrino emissivity in the quark-hadron mixed phase of neutron stars
• Asymmetric Neutrino Production in Strongly Magnetized Proto-Neutron Stars
• Kaon-meson coupling from SU(3) flavour symmetry and application to antikaon condensed dense matter in neutron star