Tidal deformability of strange stars and the GW170817 event

Abstract

In this work we consider strange stars formed by quark matter in the color-flavor-locked (CFL) phase of color superconductivity. The CFL phase is described by a Nambu-Jona-Lasinio model with four-fermion vector and diquark interaction channels. The effect of the color superconducting medium on the gluons are incorporated into the model by including the gluon self-energy in the thermodynamic potential. We construct parametrizations of the model by varying the vector coupling $G_V$ and comparing the results to the data on tidal deformability from the GW170817 event, the observational data on maximum masses from massive pulsars such as the MSP J0740+6620, and the mass/radius fits to NICER data for PSR J003+0451. Our results points out to windows for the $G_V$ parameter space of the model, with and without gluon effects included, that are compatible with all these astrophysical constraints, namely, $0.21<G_V/G_S<0.4$, and $0.02<G_V/G_S<0.1$, respectively. We also observe a strong correlation between the tidal deformabilites of the GW170817 event and $G_V$. Our results indicate that strange stars cannot be ruled out in collisions of compact binaries from the structural point of view.

9 pages, 8 figures. Accepted for publication in Phys. Rev. D

References in corpus (28)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• Multi-messenger Observations of a Binary Neutron Star Merger
• Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
• GW190814: Gravitational Waves from the Coalescence of a 23 M${}_{\odot }$ Black Hole with a 2.6 M${}_{\odot }$ Compact Object
• 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
• Tidal Love numbers of neutron stars
• Constraining neutron star tidal Love numbers with gravitational wave detectors
• Origin of the heavy elements in binary neutron-star mergers from a gravitational wave event
• Relativistic theory of tidal Love numbers
• Identification of strontium in the merger of two neutron stars
• The discovery of the electromagnetic counterpart of GW170817: kilonova AT 2017gfo/DLT17ck
• Equation of State of a Dense and Magnetized Fermion System
• Proto-Neutron and Neutron Stars in a Chiral SU(3) Model
• Constraining the Neutron Star Mass-Radius Relation and Dense Matter Equation of State with NICER. I. The Millisecond Pulsar X-ray Data Set
• Estimation of the effect of hyperonic three-body forces on the maximum mass of neutron stars
• Stability of CFL cores in Hybrid Stars
• Neural networks reconstruction of the dense-matter equation of state from neutron-star parameters
• Novel Lifshitz point for chiral transition in the magnetic field
• QCD color superconductivity in compact stars: color-flavor locked quark star candidate for the gravitational-wave signal GW190814
• Metastability of hadronic compact stars
• Dynamical Generation of a Repulsive Vector Contribution to the Quark Pressure
• Effects of a multi-quark interaction on color superconducting phase transition in an extended NJL model
• Modelling a $2.5M_{\odot }$ Compact Star with Quark Matter
• Correlations between critical parameters and bulk properties of nuclear matter
• BCS-BEC Crossover and Stability in a Nambu-Jona-Lasinio Model with Diquark-Diquark Repulsion

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• On the nature of the mass-gap object in the GW190814 event
• Dark matter effects on hybrid star properties
• Colour-Flavour Locked Quark Stars in Light of the Compact Object in HESS J1731-347 and the GW190814 Event
• Hybrid stars are compatible with recent astrophysical observations
• Ultracompact hybrid stars consistent with multimessenger astrophysics
• Strange Stars within Bosonic and Fermionic Admixed Dark Matter
• Compact star merger events with stars composed of interacting strange quark matter
• Fluid pulsation modes and tidal deformability of anisotropic strange stars in light of the GW$170817$ event
• A Bayesian study of quark models in view of recent astrophysical constraints
• Modern nuclear and astrophysical constraints of dense matter in a renormalized chiral approach
• Cold quark matter in a quasiparticle model: thermodynamic consistency and stellar properties
• Rotating Hybrid Stars with Color-Flavor-Locked Quark Matter
• Axion-Polaritons in the Magnetic Dual Chiral Density Wave Phase of Dense QCD
• Vetting quark-star models with gravitational waves in the hierarchical Bayesian framework
• Landau quantization and spin polarization of cold magnetized quark matter
• Quark stars in $D_3$-$D_7$ holographic model
• Macroscopic properties of the XTE J1814-338 as a dark matter admixed strange star
• Tidal Deformability of Quark Stars with Repulsive Interactions