Structure of Anisotropic Magnetized Neutron Stars in f(R,T) Gravity with Realistic Equation of State

Abstract

In this study, within the framework of f(R,T) modified gravity, we investigate the influence of coupling parameter, magnetic field and anisotropy parameter on the neutron star structure. This work employs an accurate equation of state (EoS), derived from realistic microscopic calculations based on the AV18 nucleon-nucleon potential, to compute the structure of this compact object. Here, determination of Schwarzschild radius, compactness, gravitational surface redshift and Kretschmann scalar within the f(R, T) gravity, confirms that our theoretical results are consistent with the observational constraints. While established physical EoSs within the framework of Einstein gravity have successfully characterized a broad range of compact objects, they remain inadequate in explaining certain massive objects residing within the mass gap (2.5 to 5 Msun). We show that some compact objects residing in the mass gap interpreted as candidates of neutron stars within the framework of f(R, T) gravity. Finally, we compare our results with the observational data from LIGO/Virgo/KAGRA and NICER, setting the parameters of the f(R, T) theory and anisotropy to successfully reproduce the masses and radii of the GW170817, PSR J0952-0607 and PSR J0740+6620 and the masses of the secondary components of GW190814 and GW200210-092254.

17 pages, 10 figures, 7 tables (Physics Letters B (2026) accepted for publication)

References in corpus (21)

• f(R,T) gravity
• 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
• Physics of Strongly Magnetized Neutron Stars
• PSR J0952-0607: The Fastest and Heaviest Known Galactic Neutron Star
• The Evolution of Compact Binary Star Systems
• Charged anisotropic matter with linear equation of state
• Impact of the PSR J0740+6620 radius constraint on the properties of high-density matter
• Violation of First Law of Thermodynamics in f(R,T) Gravity
• Role of Tilted Congruence and $f(R)$ Gravity on Regular Compact Objects
• Twin stars as probes of the nuclear equation of state: effects of rotation through the PSR J0952-0607 pulsar and constraints via the tidal deformability from the GW170817 event
• Moment of inertia of slowly rotating anisotropic neutron stars in $f(R,T)$ gravity
• Anisotropic magnetized neutron star
• Parameter estimation methods for analyzing overlapping gravitational wave signals in the third-generation detector era
• Extended Tolman III and VII solutions in $f(\mathcal{R},T)$ gravity: Models for neutron stars and supermassive stars
• A Bayesian mixture model approach to quantifying the empirical nuclear saturation point
• Normal oscillation modes and radial stability of neutron stars with a dark-energy core from the Chaplygin gas
• The Intrabinary Shock and Companion Star of Redback Pulsar J2215+5135
• Isotropic and anisotropic neutron star structure in 4D Einstein Gauss Bonnet Gravity
• Spatial Variations and Breaks in the Optical-NIR spectra of the Pulsar and PWN in SNR 0540-69.3
• Corrected Newtonian potentials in the two-body problem with applications