Compact stars in f (R, G, T) gravity

This work is to introduce a new kind of modified gravitational theory, named as f(R, G, T) (also f (R, T, G)) gravity, where R is the Ricci scalar, G is Gauss-Bonnet invariant and T is the trace of the energy-momentum tensor. With the help of different models in this gravity, we investigate some physical features of different relativistic compact stars. For this purpose, we develop the effectively modified field equations, conservation equation, and the equation of motion for test particle. Then, we check the impact of additional force (massive test particle followed by a nongeodesic line of geometry) on compact objects. Furthermore, we took three notable stars named as HerX - 1, SAXJ1808.4 - 3658 and 4U1820 - 30. The physical behavior of the energy density, anisotropic pressures, different energy conditions, stability, anisotropy, and the equilibrium scenario of these strange compact stars are analyzed through various plots. Finally, we conclude that the energy conditions hold, and the core of these stars is so dense.

Automated summary

This work introduces a new modified gravitational theory named f(R, G, T), investigates physical features of relativistic compact stars, and analyzes properties such as energy density, pressures, stability, of these stars.