Quasi-universal relations for generalized Skyrme stars

Abstract

First proposed in 2013 by Yagi and Yunes, the quasi-universal \emph{I-Love-Q relations} consist of a set of relations between the moment of inertia, the spin-induced quadrupole moment and the electric quadrupolar tidal deformability of neutron stars which are independent of the Equation of State (EoS) within an accuracy of $\sim 1\%$. In this work, we show that these relations hold for different Skyrme-based nuclear matter EoS and also for the star-like solutions of different Einstein-BPS-Skyrme-models, some of which do not even present a barotropic equation of state. Further, other quasi-universal relations are analyzed, and together with recent GW observations, we use them to select the generalized Skyrme model that better reproduces observations. Our results reaffirm both the universality of the \emph{I-Love-Q} relations and the suitability of generalized Skyrme models to describe nuclear matter inside neutron stars.

arXiv comment23 pages, 11 figures

References in corpus (47)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• GW170817: Measurements of Neutron Star Radii and Equation of State
• GW190814: Gravitational Waves from the Coalescence of a 23 M${}_{\odot }$ Black Hole with a 2.6 M${}_{\odot }$ Compact Object
• GW190425: Observation of a Compact Binary Coalescence with Total Mass $\sim 3.4M_{\odot }$
• Tidal Love numbers of neutron stars
• Tidal deformability of neutron stars with realistic equations of state and their gravitational wave signatures in binary inspiral
• Relativistic tidal properties of neutron stars
• The motion of point particles in curved spacetime
• Physics of Neutron Star Crusts
• KAGRA: 2.5 Generation Interferometric Gravitational Wave Detector
• I-Love-Q Relations in Neutron Stars and their Applications to Astrophysics, Gravitational Waves and Fundamental Physics
• I-Love-Q
• Tidal Love Numbers of Neutron and Self-Bound Quark Stars
• Nonparametric constraints on neutron star matter with existing and upcoming gravitational wave and pulsar observations
• Gravitational perturbations of the Schwarzschild spacetime: A practical covariant and gauge-invariant formalism
• Neutron star tidal deformability and equation of state constraints
• A Skyrme-type proposal for baryonic matter
• Unified equation of state for neutron stars on a microscopic basis
• Skyrmions, instantons and holography
• Observing and measuring the neutron-star equation-of-state in spinning binary neutron star systems
• Isolated and Binary Neutron Stars in Dynamical Chern-Simons Gravity
• Multipole Love Relations
• Relations Between Neutron-Star Parameters in the Hartle-Thorne Approximation
• Light Nuclei of Even Mass Number in the Skyrme Model
• Why I-Love-Q
• Hedgehog ansatz and its generalization for self-gravitating Skyrmions
• Equation of state constraints from nuclear physics, neutron star masses, and future moment of inertia measurements
• A dynamical $\alpha$-cluster model of ${}^{16}$O
• Skyrmions and clustering in light nuclei
• Gravitomagnetic response of an irrotational body to an applied tidal field
• States of Carbon-12 in the Skyrme Model
• BPS Skyrmions as neutron stars
• Phase Transition and Anisotropic Deformations of Neutron Star Matter
• Analytic I-Love-C relations for realistic neutron stars
• Magnetic tidal Love numbers clarified
• Non-Linear N-Parameter Spacetime Perturbations: Gauge Transformations
• Neutron stars in the BPS Skyrme model: mean-field limit vs. full field theory
• Skyrme models and nuclear matter equation of state
• Vibrational modes of Skyrmions
• Generalized Skyrme model with the loosely bound potential
• A new consistent Neutron Star Equation of State from a Generalized Skyrme model
• Exploring the generalized loosely bound Skyrme model
• Revisiting Hartle's model using perturbed matching theory to second order: amending the change in mass
• An attractive spin-orbit potential from the Skyrme model
• Completion of the universal I-Love-Q relations in compact stars including the mass
• Universal behavior of compact star based upon gravitational binding energy
• Neutron stars within the Skyrme model

Cited by in corpus (9)

• The high-density equation of state in heavy-ion collisions: Constraints from proton flow
• Skyrme crystals, nuclear matter and compact stars
• Universal relations for rotating Boson Stars
• Quantum Skyrmion crystals and the symmetry energy of dense matter
• Dense matter equation of state and phase transitions from a Generalized Skyrme model
• Dark I-Love-Q
• Review on the matching conditions for the tidal problem: towards the application to more general contexts
• Hot Holographic 2-flavor Quark Star
• Predictions on observing hot holographic quark star with gravitational waves