Influence of the nuclear symmetry energy slope on observables of compact stars with $\Delta$-admixed hypernuclear matter

Abstract

In this work, we study the effects of nuclear symmetry energy slope on neutron star dense matter equation of state and its impact on neutron star observables (mass-radius, tidal response). We construct the equation of state within the framework of covariant density functional theory implementing coupling schemes of non-linear and density-dependent models with viability of heavier non-nucleonic degrees of freedom. The slope of symmetry energy parameter ($L_{\text{sym}}$) is adjusted following density-dependence of isovector meson coupling to baryons. We find that smaller values of $L_{\text{sym}}$ at saturation favour early appearance of $\Delta$-resonances in comparison to hyperons leading to latter's threshold at higher matter densities. We also investigate the dependence of $L_{\text{sym}}$ on tidal deformability and compactness parameter of a $1.4M_{\odot }$ neutron star for different equation of states and observe similar converging behaviour for larger $L_{\text{sym}}$ values.

14 pages, 10 figures, 8 tables; corrected some typos; matches with published version

References in corpus (36)

• 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
• 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
• 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
• Relativistic theory of tidal Love numbers
• Accurate Determination of the Neutron Skin Thickness of ${}^{208}$Pb through Parity-Violation in Electron Scattering
• Nuclear symmetry energy probed by neutron skin thickness of nuclei
• Implications of PREX-II on the equation of state of neutron-rich matter
• Nonparametric constraints on neutron star matter with existing and upcoming gravitational wave and pulsar observations
• Constraints on the Symmetry Energy Using the Mass-Radius Relation of Neutron Stars
• Progress in Constraining Nuclear Symmetry Energy Using Neutron Star Observables Since GW170817
• The Equation of State for the Nucleonic and Hyperonic Core of Neutron Stars
• Critical Density and Impact of $\Delta (1232)$ Resonance Formation in Neutron Stars
• Nuclear symmetry energy and core-crust transition in neutron stars: a critical study
• Implications from GW170817 for $\Delta$-isobar admixed hypernuclear compact stars
• Confronting GW190814 with hyperonization in dense matter and hypernuclear compact stars
• The High-Density Symmetry Energy and Direct Urca
• $\Delta$ (1232) effects in density-dependent relativistic Hartree-Fock theory and neutron stars
• Many-body forces in the equation of state of hyperonic matter
• Dense matter equation of state of a massive neutron star with anti-kaon condensation
• Massive $\Delta$-resonance admixed hypernuclear stars with anti-kaon condensations
• Rapidly rotating $\Delta$-resonance-admixed hypernuclear compact stars
• Constraints on ${\Xi }^{-}$ nuclear interactions from capture events in emulsion
• Broken SU(6) symmetry and massive hybrid stars
• $\Delta$-admixed neutron stars: spinodal instabilities and dUrca processes
• Rotating neutron stars with quark cores
• Effects of nuclear symmetry energy and equation of state on neutron star properties
• Equation of state of strongly magnetized matter with hyperons and $\Delta$-resonances
• Symmetry energy effect on the secondary component of GW190814 as a neutron star
• New equation of state involving Bose-Einstein condensate of antikaon for supernova and neutron star merger simulations
• Baryonic dense matter in view of gravitational-wave observations

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• Tension between implications from PREX-2 data and gravitational tidal response on dense matter equation of state