Compact stars within an asy-soft quark-meson-coupling model

Abstract

We investigate compact star properties within the quark meson coupling model (QMC) with a soft symmetry energy density dependence at large densities. In particular, the hyperon content and the mass/radius curves for the families of stars obtained within the model are discussed. The hyperon-meson couplings are chosen according to experimental values of the hyperon nuclear matter potentials, and possible uncertainties are considered. It is shown that a softer symmetry energy gives rise to stars with less hyperons, smaller radii and larger masses. Hyperon-meson couplings may also have a strong effect on the mass of the star.

7 pages, revtex, accepted in Phys. Rev. C

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• Neutron star matter with strange interactions in a relativistic quark model
• Hadron-quark mixed phase in the quark-meson coupling model
• Extended quark mean-field model for neutron stars
• Hyperon star in a modified quark meson coupling model
• Nuclear symmetry energy in a modified quark meson coupling model
• Quark mean-field model for nuclear matter with or without bag
• Hyperon threshold and stellar radii
• Pasta phases within the QMC model
• Nucleon radius effects on neutron stars in quark mean field model
• Equation of state of nuclear matter and neutron stars: Quark mean-field model versus relativistic mean-field model
• Quark mean field model with pion and gluon corrections for $\Lambda ,{\Xi }^0$ hypernuclei and neutron stars
• The quark mean field model with pion and gluon corrections
• The symmetry energy $\gamma$ parameter of relativistic mean-field models
• Effects of the symmetry energy on the kaon condensates in the QMC Model
• The outer crust of a cold, non-accreting neutron star within the Quark-Meson Coupling (QMC) model
• Neutron stars with Bogoliubov quark-meson coupling model