Compactness of neutron stars and Tolman VII solutions in scalar-tensor gravity

Abstract

We systematically examine the compactness of neutron stars as Tolman VII solutions in scalar-tensor theory of gravity. As a result, when the coupling constant is confined to values provided by astronomical observations we show that the maximum compactness of neutron stars in general relativity is higher than that in scalar-tensor gravity. In addition, we show that although ultra-compact stars, with radius smaller than the Regge-Wheeler potential peak, can exist in general relativity (e.g., Tolman VII solution), their scalarized counterparts cannot {be constructed} even in the limiting case of uniform density stars.

accepted for publication in PRD

References in corpus (20)

• 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
• GW170817: Joint Constraint on the Neutron Star Equation of State from Multimessenger Observations
• Neutron-star radius constraints from GW170817 and future detections
• The relativistic pulsar-white dwarf binary PSR J1738+0333 II. The most stringent test of scalar-tensor gravity
• Echoes from the Abyss: Tentative evidence for Planck-scale structure at black hole horizons
• The observational evidence for horizons: from echoes to precision gravitational-wave physics
• Tests for the existence of horizons through gravitational wave echoes
• Neutron-star mergers in scalar-tensor theories of gravity
• Ergoregion instability of ultra-compact astrophysical objects
• The symmetry energy at subnuclear densities and nuclei in neutron star crusts
• Parameter estimation of gravitational wave echoes from exotic compact objects
• Quasiequilibrium sequences of binary neutron stars undergoing dynamical scalarization
• Constraints on the symmetry energy from observational probes of the neutron star crust
• On the maximum mass limit of neutron stars in scalar-tensor gravity
• Stellar oscillations in Eddington-inspired Born-Infeld gravity
• Pulse profiles from a pulsar in scalar-tensor gravity
• Effect of nuclear saturation parameters on possible maximum mass of neutron stars
• Sensitivity of pulsar light curves to spacetime geometry and efficacy of analytic approximations

Cited by in corpus (12)

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• Constraints on the equation of state from the stability condition of neutron stars
• Neutron Star Structure in the Presence of Nonminimally Coupled Scalar Fields
• Extended Tolman III and VII solutions in $f(\mathcal{R},T)$ gravity: Models for neutron stars and supermassive stars
• Slowly rotating Tolman VII solution
• Effects of Dark Matter on the Spontaneous Scalarization in Neutron Stars
• A metric on the space of neutron star models in general relativity and modified gravity
• Ferromagnetic Neutron Stars in Scalar-Tensor Theories of Gravity
• Analytical model of millisecond pulsar PSR J0514-4002A
• Numerical Approach to the Exterior Solution of Spherically Symmetric and Static Configuration in Scalar-Tensor Theories
• Scalarized Hybrid Neutron Stars in Scalar Tensor Gravity
• Vanishing Compactness Gap and Fermionic Compact Dark Matter in Hořava-Lifshitz Gravity