Self-bound models of compact stars and recent mass-radius measurements

Abstract

The exact composition of a specific class of compact stars, historically referred to as "neutron stars", is still quite unknown. Possibilities ranging from hadronic to quark degrees of freedom, including self-bound versions of the latter have been proposed. We specifically address the suitability of strange star models (including pairing interactions) in this work, in the light of new measurements available for four compact stars. The analysis shows that these data might be explained by such an exotic equation of state, actually selecting a small window in parameter space, but still new precise measurements and also further theoretical developments are needed to settle the subject.

To appear in PRD

References in corpus (5)

• Shapiro delay measurement of a two solar mass neutron star
• Refined Neutron-Star Mass Determinations for Six Eclipsing X-Ray Pulsar Binaries
• The Mass and Radius of the Neutron Star in 4U 1820-30
• Equation of state for the MCFL phase and its implications for compact star models
• A consistent thermodynamic treatment for quark mass density-dependent model

Cited by in corpus (10)

• Quark matter symmetry energy and quark stars
• Quark stars under strong magnetic fields
• Production of secondary particles and nuclei in cosmic rays collisions with the interstellar gas using the FLUKA code
• Isovector properties of quark matter and quark stars in an isospin-dependent confining model
• Revisiting Vaidya-Tikekar stellar model in the linear regime
• Self-bound Interacting QCD Matter in Compact Stars
• Gluon effects on the equation of state of color superconducting strange stars
• Bag vs. NJL models for color-flavor-locked strange quark matter
• Relativistic stellar modeling with perfect fluid core and anisotropic envelope fluid
• Tidal Deformability of Quark Stars with Repulsive Interactions