Rapidly rotating $\Delta$-resonance-admixed hypernuclear compact stars

Abstract

We use a set of hadronic equations of state derived from covariant density functional theory to study the impact of their high-density behavior on the properties of rapidly rotating $\Delta$-resonance-admixed hyperonic compact stars. In particular, we explore systematically the effects of variations of the bulk energy isoscalar skewness, $Q_{\mathrm{sat}}$, and the symmetry energy slope, $L_{\mathrm{sym}}$, on the masses of rapidly rotating compact stars. With models for equation of state satisfying all the modern astrophysical constraints, excessively large gravitational masses of around $2.5M_{\odot }$ are only obtained under three conditions: (a) strongly attractive $\Delta$-resonance potential in nuclear matter, (b) maximally fast (Keplerian) rotation, and (c) parameter ranges $Q_{\mathrm{sat}}\gtrsim 500$ MeV and $L_{\mathrm{sym}}\lesssim 50$ MeV. These values of $Q_{\mathrm{sat}}$ and $L_{\mathrm{sym}}$ have a rather small overlap with a large sample (total of about 260) parametrizations of covariant nucleonic density functionals. The extreme nature of requirements (a)-(c) reinforces the theoretical expectation that the secondary object involved in the GW190814 event is likely to be a low-mass black hole rather than a supramassive neutron star.

8 pages with 5 figures, matches published version

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• Massive $\Delta$-resonance admixed hypernuclear stars with anti-kaon condensations
• On the nature of the mass-gap object in the GW190814 event
• Neutron stars and the dense matter equation of state: from microscopic theory to macroscopic observations
• Delta Baryons in Neutron-Star Matter under Strong Magnetic Fields
• Heavy Magnetic Neutron Stars
• Effects of $\varphi$-meson on properties of hyperon stars in density dependent relativistic mean field model
• Chiral symmetry restoration and the $\Delta$ matter formation in neutron stars
• Relativistic hybrid stars with sequential first-order phase transitions in light of multimessenger constraints
• Hadron-quark Pasta Phase in Massive Neutron Stars
• Modelling a $2.5M_{\odot }$ Compact Star with Quark Matter
• Delta baryons in neutron stars
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• Universal relations for compact stars with heavy baryons
• Symmetry energy effect on the secondary component of GW190814 as a neutron star
• The Hadron-Quark Crossover in Neutron Star within Gaussian Process Regression Method
• Compact star merger events with stars composed of interacting strange quark matter
• $2.6M_{\odot }$ Compact Object and Neutron Stars within Eddington-Inspired Born-Infeld Theory of Gravity
• Exploring the effects of Delta Baryons in magnetars
• Impact of The Newly Revised Gravitational Redshift of X-ray Burster GS 1826-24 on The Equation of State of Supradense Neutron-Rich Matter
• Magnetic moments of the octet, decuplet, low-lying charm, and low-lying bottom baryons in a nuclear medium
• Massive relativistic compact stars from SU(3) symmetric quark models
• Bayesian Inference of dense matter equation of state of neutron star with antikaon condensation
• Baryonic dense matter in view of gravitational-wave observations
• Neutron star structure with a new force between quarks
• Influence of the nuclear symmetry energy slope on observables of compact stars with $\Delta$-admixed hypernuclear matter
• Probing the impact of Delta-Baryons on Nuclear Matter and Non-Radial Oscillations in Neutron Stars
• Massive neutron stars as mass gap candidates: Exploring equation of state and magnetic field
• Hadron-quark phase transition in neutron star by combining the relativistic Brueckner-Hartree-Fock theory and Dyson-Schwinger equation approach
• Strangeness thermodynamic instabilities in hot and dense nuclear matter
• Properties of Rotating Neutron Star in Density-dependent Relativistic Mean-field Models
• Hadron-quark phase transition in the neutron star with vector MIT bag model and Korea-IBS-Daegu-SKKU functional
• Effect of symmetry energy on properties of rapidly rotating neutron stars and universal relations
• Effects of Phi and ${\sigma }^{\ast }$-meson on properties of hyperon stars including $\Delta$ resonance
• Properties of H particle-admixed compact star