Strange quark matter and proto-strange stars in an equivaparticle model
arXiv:2110.09187 · doi:10.1088/1674-1137/ac4b5b
Abstract
The properties of strange quark matter and the structures of (proto-)strange stars are studied within the framework of an equivparticle model, where a new quark mass scaling and self-consistent thermodynamic treatment are adopted. Our results show that the perturbative interaction has a strong impact on the properties of strange quark matter. It is found that the energy per baryon increases with temperature, while the free energy decreases and eventually becomes negative. At fixed temperatures, the pressure at the minimum free energy per baryon is zero, suggesting that the thermodynamic self-consistency is preserved. Additionally, the sound velocity v in quark matter approaches to the extreme relativistic limit (c/sqrt(3)) as the density increases. By increasing the strengths of confinement parameter D and perturbation parameter C, the tendency for v to approach the extreme relativistic limit at high density is slightly weakened. For (proto-)strange stars, in contrast to the quark mass scalings adopted in previous publications, the new quark mass scaling can accommodate massive proto-strange stars with their maximum mass surpassing twice the solar mass at T = 50 MeV.
References in corpus (14)
- GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
- A Massive Pulsar in a Compact Relativistic Binary
- PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter
- A NICER View of PSR J0030+0451: Millisecond Pulsar Parameter Estimation
- Quark matter in compact stars?
- Chromomagnetic instability in dense quark matter
- Deconfinement phase transition in hybrid neutron stars from the Brueckner theory with three-body forces and a quark model with chiral mass scaling
- Thermodynamics with density and temperature dependent particle masses and properties of bulk strange quark matter and strangelets
- Thermodynamic consistency, quark mass scaling, and properties of strange matter
- Self-consistent quasiparticle model for quark-gluon plasma
- Effects of color superconductivity on the nucleation of quark matter in neutron stars
- Stability of magnetized strange quark matter in the MIT bag model with the density dependent bag pressure
- The pasta phase and its consequences on neutrino opacities
- Magnetized strange quark matter in a mass-density-dependent model