The role of strangeness in hybrid stars and possible observables

Abstract

We study the effects of strangeness on the quark sector of a hybrid star equation of state. Since the model we use to describe quarks is the same as the one we use to describe hadrons, we can also study the effects of strangeness on the chiral symmetry restoration and deconfinement phase transitions (first order or crossover). Finally, we analyze combined effects of hyperons and quarks on global properties of hybrid stars, like mass, radius and cooling profiles. It is found that a large amount of strangeness in the core is related to the generation of twin-star solutions, which can have the same mass as the lower or zero strangeness counterpart, but with smaller radii.

References in corpus (16)

• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• Rapid Cooling of the Neutron Star in Cassiopeia A Triggered by Neutron Superfluidity in Dense Matter
• Sound velocity bound and neutron stars
• A new quark-hadron hybrid equation of state for astrophysics - I. High-mass twin compact stars
• Proto-Neutron and Neutron Stars in a Chiral SU(3) Model
• Improved Mass and Radius Constraints for Quiescent Neutron Stars in Omega Cen and NGC 6397
• An effective chiral Hadron-Quark Equation of State
• Cooling rates of neutron stars and the young neutron star in the Cassiopeia A supernova remnant
• Neutron stars with small radii -- the role of delta resonances
• The Van-der-Waals Gas EOS for the Lorentz Contracted Spheres
• The axial anomaly and the phases of dense QCD
• A chiral lagrangian with Broken Scale: testing the restoration of symmetries in astrophysics and in the laboratory
• Single-flavor CSL phase in compact stars
• Equation of state for neutron stars: Hyperon mixing in SU(3) flavor symmetry
• Some aspects of the phase diagram of nuclear matter relevant to compact stars

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• Neutron Star Equation of State in light of GW190814
• Implications from GW170817 for $\Delta$-isobar admixed hypernuclear compact stars
• Extreme Matter meets Extreme Gravity: Ultra-heavy neutron stars with crossovers and first-order phase transitions
• An effective model for the QCD phase transitions at finite baryon density
• Far-from-equilibrium search for the QCD critical point
• Future Physics Perspectives on the Equation of State from Heavy Ion Collisions to Neutron Stars
• The slope, the hill, the drop, and the swoosh: Learning about the nuclear matter equation of state from the binary Love relations
• $g$-modes of neutron stars with hadron-to-quark crossover transitions
• Reconciling Nuclear and Astrophysical Constraints
• Effects of the quark-hadron phase transition on highly magnetized neutron stars
• The internal composition of proto-neutron stars under strong magnetic fields
• Structure in the speed of sound: from neutron stars to heavy-ion collisions
• The possibility of twin star solutions in a model based on lattice QCD thermodynamics
• Compactness in the Thermal Evolution of Twin Stars
• Exploring $\Delta$-resonance in neutron stars: implications from astrophysical and nuclear observations
• Investigating the Impact of Higher-Order Phase Transitions in Binary Neutron-Star Mergers
• Fundamental-mode eigenfrequencies of neutral and charged twin neutron stars
• Rotational Properties of Inverted Hybrid Stars
• Supporting the existence of the QCD critical point by compact star observations
• Strangeness in astrophysics: Theoretical developments
• Recurring region for neutron-star observables
• Bayesian Constraints on the Neutron Star Equation of State with a Smooth Hadron-Quark Crossover
• Compact Star Twins with a Dark Matter Core