Quark star phenomenology

We analyze models of quark matter appropriate to the description of matter at densities found within neutron stars. We consider in detail two models: quantum chromodynamics with a bag constant $B=56$ MeV/fm³, and quantum chromodynamics with $B=0$. Both models are consistent with the strength of the quark-quark force found in high-energy particle phenomenology. The pressure, energy density per baryon, and baryon density are calculated. An interesting prediction of our models is that a quark star should have strangeness comparable to its baryon number.