Scaling and universality in strange quark stars

Abstract

We derive scaling laws that connect certain macroscopic observables of strange quark stars with key microscopic properties of self-bound quark matter, such as the energy per baryon at zero pressure and the strength of repulsive interactions. We also identify universal relations linking global properties of strange quark stars - specifically, their moment of inertia, tidal deformability, and both gravitational and baryonic compactness. Remarkably, these relations hold for two substantially different microscopic models - the quark-mass density-dependent model with excluded-volume corrections and the vector MIT bag model - underscoring their robust, model-independent nature. We demonstrate that the universal relations for strange quark stars differ significantly from those previously established for neutron stars composed of hadronic matter, thus enabling discrimination between the two types of objects without requiring detailed knowledge of their equations of state. Moreover, observational constraints on the maximum mass of compact stars could place bounds on both the depth of quark-matter self-binding and the strength of quark repulsive interactions.

References in corpus (44)

• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• GW170817: Measurements of Neutron Star Radii and Equation of State
• Neutron Star Structure and the Equation of State
• Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar
• A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy
• Strange Quark Matter and Compact Stars
• Towards gravitational-wave asteroseismology
• 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
• The Cooling of Compact Stars
• Constraining the Equation of State with Moment of Inertia Measurements
• Approximate Universal Relations for Neutron Stars and Quark Stars
• Maximum mass, moment of inertia and compactness of relativistic stars
• Moments of inertia for neutron and strange stars: limits derived for the Crab pulsar
• Inferring physical parameters of compact stars from their f-mode gravitational wave signals
• Thermodynamics, strange quark matter, and strange stars
• Strange stars as persistent sources of gravitational waves
• Strange quark matter with dynamically generated quark masses
• Mass formulas and thermodynamic treatment in the mass-density-dependent model of strange quark matter
• Deconfinement phase transition in hybrid neutron stars from the Brueckner theory with three-body forces and a quark model with chiral mass scaling
• Fundamental oscillation modes of neutron stars: validity of universal relations
• High-density QCD pairing in compact star structure
• Thermodynamic consistency, quark mass scaling, and properties of strange matter
• Equation of state constraints from nuclear physics, neutron star masses, and future moment of inertia measurements
• Discriminating hadronic and quark stars through gravitational waves of fluid pulsation modes
• Constraining color flavor locked strange stars in the gravitational wave era
• Modified MIT bag Models -- part I: Thermodynamic consistency, stability windows and symmetry group
• Self-bound CFL stars in binary systems : are they "hidden" among the black hole candidates?
• Massive hybrid stars with a first order phase transition
• Modified MIT Bag Models -- part II: QCD phase diagram and hot quark stars
• Bayesian uncertainty quantification of perturbative QCD input to the neutron-star equation of state
• Quark-diquark equation of state and compact star structure
• A consistent thermodynamic treatment for quark mass density-dependent model
• Universal relations for compact stars with heavy baryons
• Constraining mass, radius and tidal deformability of compact stars with axial wI modes: new universal relations including slow stable hybrid stars
• Universal relations for compact stars with exotic degrees of freedom
• Gravitational wave asteroseismology limits from low density nuclear matter and perturbative QCD
• Cold dense quark matter with phenomenological medium effects: a self-consistent formulation of the quark-mass density-dependent model
• Improvement of the parameter measurement accuracy by the third-generation gravitational wave detector Einstein Telescope
• Moment of Inertia for Axisymmetric Neutron Stars in the Standard-Model Extension
• Strange quark stars: the role of excluded volume effects
• Strangelets at finite temperature: nucleon emission rates, interface and shell effects