Numerical computation of mass-radius profiles, compactness, and gravitational redshift for strange quark stars in 5D Gauss-Bonnet gravity across several values of the Gauss-Bonnet parameter.
Lattice QCD Constraints on Hybrid and Quark Stars
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abstract
A QCD-motivated dynamical-quasiparticle model with parameters adjusted to reproduce the lattice-QCD equation of state is extrapolated from region of high temperatures and moderate baryonic densities to the domain of high baryonic densities and zero temperature. The resulting equation of state matched with realistic hadronic equations of state predicts a phase transition into the quark phase at higher densities than those reachable in neutron star interiors. This excludes the possibility of the existence of hybrid (hadron-quark) stars. Pure quark stars are possible and have low masses, small radii and very high central densities. Similar results are obtained for a simple bag model with massive quarks, fitted to reproduce the same lattice results. Self-bound quark matter is also excluded within these models. Uncertainties in the present extrapolation re discussed. Comparison with standard bag models is made.
fields
gr-qc 2years
2019 2verdicts
UNVERDICTED 2representative citing papers
Exact analytical solution for anisotropic CFL strange quark stars with non-linear EOS, satisfying energy conditions, yielding mass-radius profiles and compactness values.
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Relativistic strange quark stars in Lovelock gravity
Numerical computation of mass-radius profiles, compactness, and gravitational redshift for strange quark stars in 5D Gauss-Bonnet gravity across several values of the Gauss-Bonnet parameter.
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Anisotropic strange quark stars with a non-linear equation-of-state
Exact analytical solution for anisotropic CFL strange quark stars with non-linear EOS, satisfying energy conditions, yielding mass-radius profiles and compactness values.