Structural Properties of Magnetized Neutron Stars under f (R, T ) Gravity Framework

TL;DR

This study explores how strong magnetic fields and f(R,T) gravity modifications influence neutron star structure, revealing that certain gravity parameters increase maximum mass while magnetic fields slightly decrease it, aligning with observational data.

Contribution

It introduces a detailed analysis of neutron stars under f(R,T) gravity with magnetic fields, highlighting the impact of matter-geometry coupling on star properties.

Findings

Higher maximum masses with more negative gravity parameters.

Strong magnetic fields cause slight mass reduction.

Results agree with GW170817, PSR, and NICER observations.

Abstract

The current work investigates the structural properties of neutron stars in the presence of a strong magnetic field within the framework of f(R,T) modified gravity, where the matter-geometry coupling leads to deviations from general relativity at high matter densities. We present here the mass-radius sequences, as well as the mass and pressure distributions for various values of the modified gravity parameter and the central magnetic field. The modified Tolman-Oppenheimer- Volkoff equations are numerically solved using isotropic equations of state, specifically the APR, FPS, and SLy models. Comparing the corresponding results in the context of general relativity suggests that more negative values of the modified gravity parameter result in higher maximum gravitational masses. In contrast, strong central magnetic fields of up to 1018 Gauss cause only a slight decrease in maximum mass without disrupting spherical symmetry. Our findings are in agreement with the observed data from GW170817, PSR and NICER.