Speed of sound and quark confinement inside neutron stars
arXiv:2005.14535 · doi:10.1140/epjst/e2020-000093-3
Abstract
Several observations of high-mass neutron stars (NSs), as well as the first historic detection of the binary neutron star merger GW170817, have delivered stringent constraints on the equation of state (EoS) of cold and dense matter. Recent studies suggest that, in order to simultaneously accommodate a NS and the upper limit on the compactness, the pressure has to swiftly increase with density and the corresponding speed of sound likely exceeds the conformal limit. In this work, we employ a unified description of hadron-quark matter, the hybrid quark-meson-nucleon (QMN) model, to investigate the EoS under NS conditions. We show that the dynamical confining mechanism of the model plays an important role in explaining the observed properties of NSs.
arXiv commentsubmitted to epj st. arXiv admin note: substantial text overlap with arXiv:2004.09566
References in corpus (54)
- Shapiro delay measurement of a two solar mass neutron star
- A Massive Pulsar in a Compact Relativistic Binary
- GW170817: Measurements of Neutron Star Radii and Equation of State
- 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
- GW190425: Observation of a Compact Binary Coalescence with Total Mass
- Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar
- The equation of state in (2+1)-flavor QCD
- Full result for the QCD equation of state with 2+1 flavors
- The QCD equation of state with dynamical quarks
- Constraints on a phenomenologically parameterized neutron-star equation of state
- Equation of state and neutron star properties constrained by nuclear physics and observation
- The NANOGrav Nine-year Data Set: Mass and Geometric Measurements of Binary Millisecond Pulsars
- Cold Quark Matter
- Identifying a first-order phase transition in neutron star mergers through gravitational waves
- Generic conditions for stable hybrid stars
- Constraining the speed of sound inside neutron stars with chiral effective field theory interactions and observations
- Quarkyonic Matter and Neutron Stars
- Sound velocity bound and neutron stars
- Chiral Phase Transition within Effective Models with Constituent Quarks
- QCD equation of state at nonzero chemical potential: continuum results with physical quark masses at order mu^2
- Implications from GW170817 and I-Love-Q relations for relativistic hybrid stars
- Hadron Production in Ultra-relativistic Nuclear Collisions: Quarkyonic Matter and a Triple Point in the Phase Diagram of QCD
- Compact stars with sequential QCD phase transitions
- Chiral Symmetry of Baryons
- Quarkyonic Matter and Chiral Symmetry Breaking
- Quark deconfinement as supernova explosion engine for massive blue-supergiant stars
- Baryons and the phase diagram for a large number of colors and flavors
- The hadronic SU(3) Parity Doublet Model for Dense Matter, its extension to quarks and the strange equation of state
- Quarkyonic Matter Equation of State in Beta-Equilibrium
- An effective chiral Hadron-Quark Equation of State
- Light baryons below and above the deconfinement transition: medium effects and parity doubling
- Cold, dense nuclear matter in a SU(2) parity doublet model
- Dynamical Derivation of the Momentum Space Shell Structure for Quarkyonic Matter
- Equation of state for hot QCD and compact stars from a mean field approach
- Chiral Symmetry Realization for Even- and Odd-parity Baryon Resonances
- Lattice Simulations of the Thermodynamics of Strongly Interacting Elementary Particles and the Exploration of New Phases of Matter in Relativistic Heavy Ion Collisions
- High-mass twin stars with a multi-polytrope EoS
- Thermodynamics of dense hadronic matter in a parity doublet model
- Hybrid Stars in an SU(3) Parity Doublet Model
- Hyperons in thermal QCD: A lattice view
- Higher-order baryon number susceptibilities: interplay between the chiral and the nuclear liquid-gas transitions
- An effective model for the QCD phase transitions at finite baryon density
- Chiral symmetry restoration by parity doubling and the structure of neutron stars
- Large Sound Speed in Dense Matter and the Deformability of Neutron Stars
- Chiral Mirror-Baryon-Meson Model and Nuclear Matter beyond Mean-Field
- The application of the Quark-Hadron Chiral Parity-Doublet Model to neutron star matter
- Towards a Unified Quark-Hadron Matter Equation of State for Applications in Astrophysics and Heavy-Ion Collisions
- The speed of sound and specific heat in the QCD plasma: hydrodynamics, fluctuations and conformal symmetry
- Constraint to chiral invariant masses of nucleons from GW170817 in an extended parity doublet model
- Parity Doubling and the Dense Matter Phase Diagram under Constraints from Multi-Messenger Astronomy
- Net-baryon number fluctuations in the Hybrid Quark-Meson-Nucleon model at finite density
- Casimir effect for nucleon parity doublets
- Towards a new quark-nuclear matter EoS for applications in astrophysics and heavy-ion collisions
Cited by in corpus (18)
- Extreme Matter meets Extreme Gravity: Ultra-heavy neutron stars with crossovers and first-order phase transitions
- The slope, the hill, the drop, and the swoosh: Learning about the nuclear matter equation of state from the binary Love relations
- Insights on the peak in the speed of sound of ultradense matter
- Chiral symmetry restoration and the matter formation in neutron stars
- Hybrid neutron stars in the mass-radius diagram
- Structure in the speed of sound: from neutron stars to heavy-ion collisions
- Reconciling multi-messenger constraints with chiral symmetry restoration
- Speed of Sound in Hybrid Stars and the Role of Bag Pressure in the Emergence of Special Points on M-R Variation of Hybrid Stars
- Speed of sound in dense matter and two families of compact stars
- Fluctuations near the liquid-gas and chiral phase transitions in hadronic matter
- Speed of Sound for Hadronic and Quark Phases in a Magnetic Field
- Fluctuations and correlations of baryonic chiral partners
- Properties of Hybrid Stars with Density Dependent Bag Model
- Variation of delta baryon mass and hybrid star properties in static and rotating conditions
- Rotating Hybrid Stars with Color-Flavor-Locked Quark Matter
- Interplay between chiral dynamics and repulsive interactions
- Anatomy of critical fluctuations in hadronic matter
- Recurring region for neutron-star observables