Modern compact star observations and the quark matter equation of state
arXiv:nucl-th/0609067 · doi:10.1016/j.physletb.2007.08.048
Abstract
We present a hybrid equation of state (EoS) for dense matter that satisfies phenomenological constraints from modern compact star (CS) observations which indicate high maximum masses (M = 2 M_sun) and large radii (R> 12 km). The corresponding isospin symmetric EoS is consistent with flow data analyses of heavy-ion collisions and a deconfinement transition at approx. 0.55 fm^{-3}. The quark matter phase is described by a 3-flavor Nambu--Jona-Lasinio model that accounts for scalar diquark condensation and vector meson interactions while the nuclear matter phase is obtained within the Dirac-Brueckner-Hartree-Fock (DBHF) approach using the Bonn-A potential. We demonstrate that both pure neutron stars and neutron stars with quark matter cores (QCSs) are consistent with modern CS observations. Hybrid star configurations with a CFL quark core are unstable.
16 pages, 4 figures; published version, important note added in proof
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Cited by in corpus (13)
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- Stability of CFL cores in Hybrid Stars
- Equilibrium sequences of non rotating and rapidly rotating crystalline color superconducting hybrid stars
- Bulk viscosity in kaon-condensed color-flavor locked quark matter
- Color neutrality effects in the phase diagram of the PNJL model
- Stable configurations of hybrid stars with colour-flavour-locked core
- Role of nonlinear vector meson interactions in hyperon stars
- Compact star constraints on the high-density EoS
- 1-2-3-flavor color superconductivity in compact stars
- Structure and cooling of compact stars
- Phase diagram of neutron star quark matter in nonlocal chiral models
- Equation of state for hybrid compact stars with a nonlocal chiral quark model
- Astronomy meets QCD: cooling constraints for the theories of internal structure of compact objects