Structural properties of charged compact stars with color-flavour-locked quarks matter

Abstract

The observations of pulsars with masses close to 2$M_{\odot }$ have put strong constraints on the equation of state (EoS) of neutron-rich matter at supranuclear densities. Moreover, the exact internal composition of those objects is largely unknown to us. Aiming to reach the 2$M_{\odot }$ limit, here we investigate the impact of electric charge on properties of compact stars assuming that the charge distribution is proportional to the mass density. The study is carried out by solving the Tolman-Oppenheimer-Volkoff (TOV) equation for a well-motivated exotic quark matter in the color-flavor-locked (CFL) phase of color superconductivity. The existence of the CFL phase may be the true ground state of hadronic matter with the possibility of the existence of a pure stable quark star (QS). Concerning the equation-of-state, we obtain structural properties of quark stars and compute the mass, the radius as well as the total electric charge of the star. We analyze the dependence of the physical properties of these QSs depending on the free parameters with special attention on mass-radius relation. We also briefly discuss the mass vs central mass density $(M-{\epsilon }_c)$ relation for stability, the effect of electric charge and compactness. Finally, our results are compared with the recent observations data on mass-radius relationship.

arXiv comment12 pages, 8 figures, references added, to appear in Mod. Phys. Lett. A

References in corpus (48)

• 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
• QCD at Finite Baryon Density: Nucleon Droplets and Color Superconductivity
• A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy
• Refined Mass and Geometric Measurements of the High-Mass PSR J0740+6620
• Diquark Bose Condensates in High Density Matter and Instantons
• High-precision QCD at hadron colliders: electroweak gauge boson rapidity distributions at NNLO
• The NANOGrav Nine-year Data Set: Mass and Geometric Measurements of Binary Millisecond Pulsars
• The NANOGrav 11-year Data Set: High-precision timing of 45 Millisecond Pulsars
• Color superconducting quark matter
• The Maximum Mass of a Neutron Star
• Static charged perfect fluid spheres in general relativity
• The Mass and Radius of the Neutron Star in EXO 1745-248
• The Minimal CFL-Nuclear Interface
• A 2.1 Solar Mass Pulsar Measured by Relativistic Orbital Decay
• Electrically charged compact stars and formation of charged black holes
• Charged anisotropic matter with linear or nonlinear equation of state
• Charged anisotropic matter with linear equation of state
• Sharp bounds on the critical stability radius for relativistic charged spheres
• Physics and Astrophysics of Strange Quark Matter
• Compact stars with color superconducting quark matter
• Absence of two-flavor color-superconductivity in compact stars
• Color-Neutral Superconducting Quark Matter
• Extended Gravity Description for the GW190814 Supermassive Neutron Star
• Some charged polytropic models
• Color-flavor locked strange matter
• Causal Limit of Neutron Star Maximum Mass in $f(R)$ Gravity in View of GW190814
• Neutron Star Equation of State in light of GW190814
• Classes of exact Einstein-Maxwell solutions
• GW190814's secondary component with mass $(2.50-2.67)$ M${}_{\odot }$ as a super-fast pulsar
• High-density QCD pairing in compact star structure
• Equilibrium and stability of charged strange quark stars
• Polytropic spheres with electric charge: compact stars, the Oppenheimer-Volkoff and Buchdahl limits, and quasiblack holes
• Quark Stars in 4D Einstein-Gauss-Bonnet gravity with an Interacting Quark Equation of State
• Constraining the electric charges of some astronomical bodies in Reissner-Nordstrom spacetimes and generic r^-2-type power-law potentials from orbital motions
• Constraining color flavor locked strange stars in the gravitational wave era
• Physical Model of Dust Polarization by Radiative Torque Alignment and Disruption and Implications for Grain Internal Structures
• Charged Vaidya-Tikekar model for super compact star
• Anisotropic quark stars in $R^2$ gravity
• Tight constraints on Einstein-dilation-Gauss-Bonnet gravity from GW190412 and GW190814
• Novel Phases at High Density and their Roles in the Structure and Evolution of Neutron Stars
• Anisotropic Quark Stars with an Interacting Quark Equation of State
• Limits on stellar structures in Lovelock theories of gravity
• Compact stars with a small electric charge: the limiting radius to mass relation and the maximum mass for incompressible matter
• Relativistic polytropic spheres with electric charge: Compact stars, compactness and mass bounds, and quasiblack hole configurations
• Equation of state constraints from multi-messenger observations of neutron star mergers
• Structure of Strange Dwarfs with Color Superconducting Core

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