Self-bound Interacting QCD Matter in Compact Stars

Abstract

The quark gluon plasma (QGP) at zero temperature and high baryon number is a system that may be present inside compact stars. It is quite possible that this cold QGP shares some relevant features with the hot QGP observed in heavy ion collisions, being also a strongly interacting system. In a previous work we have derived from the QCD Lagrangian an equation of state (EOS) for the cold QGP, which can be considered an improved version of the MIT bag model EOS. Compared to the latter, our equation of state reaches higher values of the pressure at comparable baryon densities. This feature is due to perturbative corrections and also to non-perturbative effects. Here we apply this EOS to the study of neutron stars, discussing the absolute stability of quark matter and computing the mass-radius relation for self-bound (strange) stars. The maximum masses of the sequences exceed two solar masses, in agreement with the recently measured values of the mass of the pulsar PSR J1614-2230, and the corresponding radii around 10-11 km.

References in corpus (11)

• Shapiro delay measurement of a two solar mass neutron star
• Color superconductivity in dense quark matter
• The Mass and Radius of the Neutron Star in 4U 1820-30
• Quark Matter In Massive Compact Stars
• Quark matter in compact stars?
• Superconductivity of QCD vacuum in strong magnetic field
• The Massive Pulsar PSR J1614-2230: Linking Quantum Chromodynamics, Gamma-ray Bursts, and Gravitational Wave Astronomy
• Pulsars as Astrophysical Laboratories for Nuclear and Particle Physics
• Gluon condensates in a cold quark gluon plasma
• Self-bound models of compact stars and recent mass-radius measurements
• Model Study of a Quark Star

Cited by in corpus (14)

• Implications of the measurement of pulsars with two solar masses for quark matter in compact stars and HIC. A NJL model case study
• A light strange star in the remnant HESS J1731-347: minimal consistency checks
• Discriminating hadronic and quark stars through gravitational waves of fluid pulsation modes
• Compact Ultra Dense Matter Impactors
• The quark gluon plasma equation of state and the expansion of the early Universe
• The quark chemical potential of QCD phase transition and the stochastic background of gravitational waves
• Modelling a $2.5M_{\odot }$ Compact Star with Quark Matter
• Bubble dynamics and the quark-hadron phase transition in nuclear collisions
• Crust effects and the cooling relaxation time in highly magnetized neutron stars
• Compact stars with strongly coupled quark matter in a strong magnetic field
• Waves in magnetized quark matter
• The stifness of the supranuclear equation of state (once again)
• The sharpness of the quark-hadron transition and the properties of hybrid stars
• Tidal Deformability of Quark Stars with Repulsive Interactions